Write the correct answer
0 of 20 Questions completed
Questions:
You have already completed the quiz before. Hence you can not start it again.
Quiz is loading…
You must sign in or sign up to start the quiz.
You must first complete the following:
0 of 20 Questions answered correctly
Your time:
Time has elapsed
You have reached 0 of 0 point(s), (0)
Earned Point(s): 0 of 0, (0)
0 Essay(s) Pending (Possible Point(s): 0)
Average score 

Your score 

Can the experimental probability of an event be a negative number ? If not, why ?
Upload your answer to this question.
This response will be awarded full points automatically, but it can be reviewed and adjusted after submission.
No, since the number of trails in which the event can happen cannot be negative and the total number of trials is always positive.
The probability of an event can be any number from 0 to 1. Is it true ? Justify.
Upload your answer to this question.
This response will be awarded full points automatically, but it can be reviewed and adjusted after submission.
It is true that the minimum probability is zero and the maximum probability of an event is 1 and the probability of an event lies between 0 and 1.
As the number of tosses increases, the ratio of the number of heads to the total number of tosses will be \( \dfrac{1}{2}\). It is correct ? if not, write the correct one.
Upload your answer to this question.
This response will be awarded full points automatically, but it can be reviewed and adjusted after submission.
No, as the number of tosses of a coin increase, the ratio of the number of heads to the total number of tosses will be near to not exactly
What is the probability of an impossible event ?
Upload your answer to this question.
This response will be awarded full points automatically, but it can be reviewed and adjusted after submission.
The probability of an impossible event is 0. Impossible event is an event that is non existing.
What is the probability of a sure event ?
Upload your answer to this question.
This response will be awarded full points automatically, but it can be reviewed and adjusted after submission.
A sure event is an event, which always happens. For example ,it’s a sure event to obtain a number between 1 and 6 when rolling an ordinary die. The probability of a sure event has the value of 1. The probability of an impossible event has the value of 0.
An unbiasd die is thrown. List all possible outcomes.
Upload your answer to this question.
This response will be awarded full points automatically, but it can be reviewed and adjusted after submission.
Possible outcomes are 1, 2, 3, 4, 5, 6
Two coins are tossed 500 times and the outcomes are recorded as below :
Based on this information, find the probability for (i) at most one head (ii) at least one head.
Upload your answer to this question.
This response will be awarded full points automatically, but it can be reviewed and adjusted after submission.
(i) P(at most one head)
(ii) P(at least one head)
In a sample study of 420 people, it was found that 240 people were government employees. If a person is selected at random, find the probability that the person is not a government employee.
Upload your answer to this question.
This response will be awarded full points automatically, but it can be reviewed and adjusted after submission.
P(government employees)
P(not a government employees)
Eleven bags of wheat flour, each marked 5 kg, actually contained the following weights of flour (in kg) : 4.97, 5.05, 5.08, 5.03, 5.00, 5.06, 5.08, 4.98, 5.04, 5.07, 5.00. Find the probability that any of these bags chosen at random contains more than 5 kg of flour.
Upload your answer to this question.
This response will be awarded full points automatically, but it can be reviewed and adjusted after submission.
The total number of wheat flour bags = 11.
The number of wheat flour bags contain more than 5 Kg are 7.
Then probability of bags chosen at random
A die is thrown 500 times, the frequency of outcomes 1, 2, 3, 4, 5 and 6 are noted in the following frequency distribution table :
Find the probability of occurrence of a prime number.
Upload your answer to this question.
This response will be awarded full points automatically, but it can be reviewed and adjusted after submission.
P(prime number)
Following table shows the marks obtained by 30 students in a class test :
Find the probability that a student secures
(a) 60 marks
(b) less than 60 marks
Upload your answer to this question.
This response will be awarded full points automatically, but it can be reviewed and adjusted after submission.
P(60 marks)
P(less than 60 marks)
A survey of 100 students is done regarding the likes and dislikes about the subject mathematics. The data are given below :
Find the probability that a student chosen randomly
(a) likes mathematics
(b) does not like mathermatics
Upload your answer to this question.
This response will be awarded full points automatically, but it can be reviewed and adjusted after submission.
P(likes mathematics)
P(does not like mathematics)
Two dice are thrown simultaneously 200 times. Each time the sum of numbers appearing on their tops is noted and recorded as below :
Find the probability of getting a sum :
(i) more than 10 ?
(ii) less than or equal to 5 ?
Upload your answer to this question.
This response will be awarded full points automatically, but it can be reviewed and adjusted after submission.
(i) P(more than 10)
(ii) P(less than or equal to 5)
The following table is an extract from a mortality table
(i) Based on this information, what is the probability of a person ‘aged 60’ of dying within a year ?
(ii) What is the probability that a person ‘aged 61’ will live for 4 years ?
Upload your answer to this question.
This response will be awarded full points automatically, but it can be reviewed and adjusted after submission.
(i) No. of person aged 60 dying
(ii) No. of persons aged 61′ surving for 4 years = 2320
In a survey of 200 people, it was found that 142 read newspaper daily and rest read newspaper occasionally. Find the probability that a person chosen at random :
(i) reads newspaper daily
(ii) reads newspaper occasionally
Upload your answer to this question.
This response will be awarded full points automatically, but it can be reviewed and adjusted after submission.
(i)
(ii)
The percentage of marks obtained by a student in monthly unit test are given below :
Find the probability that the student gets :
(i) more than 70% marks
(ii) less than 70% marks
(iii) more than 90% marks
Upload your answer to this question.
This response will be awarded full points automatically, but it can be reviewed and adjusted after submission.
(i)
(ii)
(iii)
Bulbs are packed in cartons, each containing 40 bulbs. Seven bundered cartons were examined for defective bulbs and the results are given in the following table :
One carton was selected at random, what is the probability that it has :
(i) no defective bulbs ?
(ii) defective bulbs from 2 to 6 ?
(iii) defective bulbs less than 4?
Upload your answer to this question.
This response will be awarded full points automatically, but it can be reviewed and adjusted after submission.
(i) P(no defective bulb)
(ii) P(defective bulb from 2 to 6)
(iii)
The records of a weather station shows that out of the 250 consecutive days, its weather forecast were correct 175 times :
(i) What is the probability that on a given day it was correct?
(ii) What is the probability that it was not correct on a given day ?
Upload your answer to this question.
This response will be awarded full points automatically, but it can be reviewed and adjusted after submission.
(i)
(ii)
Marks obtained by students of class IX in Mathematics are given in the table :
(i) Find the probability that a student gets less than 40% in a test.
(ii) Find the probability that a student gets more than 80%
Upload your answer to this question.
This response will be awarded full points automatically, but it can be reviewed and adjusted after submission.
(i) P(less than 40%)
(ii) P(more than 80%)
A bag contains tickets which are numbered from 1 to 100. Find the probability that a ticket number picked up at random
(i) is a multiple of 7
(ii) is not a multiple of 7.
Upload your answer to this question.
This response will be awarded full points automatically, but it can be reviewed and adjusted after submission.
(i) There are 14 numbers which are divisible by 7
(ii)