Questions Bank-MCQ 1-Probability – Class IX

A coin is tossed 100 times with the following frequencies :
Head : 25, Tail : 75
Probabilities for each event are respectively

Two coins are tossed simultaneously 100 times. The results are given below : No heads : 20 times, one head : 40 times, two heads : 40 times. The probability of getting one head is :

In an experiment a coin is tossed 500 times. If the head turns up 280 times, the experimental probability of getting a head is :

In a cricket match, a batsman hits a boundary 4 times out of 25 balls he plays. The probability that he hits a boundary is :

A survey of 650 men showed that only 52 of them know English. Out of them, if one is selected at random, what is the probability that the selected man knows English ?

In a One-Day cricket match, a batsman played 40 balls. The runs scored were as follows :

The probability that the batsman scored no run is :

A coin is tossed 100 times and head appears 64 times. The probability of getting a tail is

A coin is tossed 500 times and head appeared 300 times. The sum of the probability of getting a head and the probability of getting a tail is :

Three coins are tossed simultaneously 200 times with following outcomes :
The probability of getting two heads is :

A survey of 600 men, showed that only 85 of them know English. Out of them one man is selected at random. The probability that the selected man does not know English is :

12 packets of salt, each marked 2 kg, actually contained the following weights (in kg) of salt : 1.980, 2.000, 2.025, 1.850, 1.990, 2.040, 1.950, 2.050, 2.060, 1.980, 2.030, 1.970
Out of these packets, one packet is chosen at random. The probability that the chosen packet contains less than 2 kg of salt is :

In a survey of 400 students, 160 liked Mathematics and rest disliked it. The probability that a student chosen at random likes Mathematics is :

Following are the ages (in years) of 360 patients, getting medical treatment in a hospital.

One of the patients is selected at random. The probability that his age is 30 years or more but less than 40 years is :

In an experiment, a coin is tossed 500 times. If the head turns up 280 times, then the probability of getting a tail is :

A dice is tossed 200 times simultaneously, and the frequencies of various outcomes are given below :

The probability of getting 5 is :

An organisation selected 200 families and surveyed them to determine the number of girls in the family as follow.

The probability of a family having 1 girl is :

80 bulbs are selected at random from a lot and their life time (in hrs) is recorded in the form of a frequency table given below : –
One bulb is selected at random from the lot. The probability that its life is 1150 hours, is :

In a medical examination of students of a class, the following blood groups are recorded :

A student is selected at random from the class. The probability that he/she has blood group B, is

A die is thrown 225 times and the results were as follows :

The probability of getting a prime number is :

Three coins were tossed simultaneously 200 times with following frequencies of different outcomes :

The probability of getting more than one head is

Marks obtained by 50 students in a class test of 100 marks are given below :

The probability that a student obtains less than 50% marks is :