Complementary events are two outcomes of an event that are the only two possible outcomes. This is like flipping a coin and getting heads or tails.
P(E) + P(E¯) = 1, where E and E¯ are complementary events.
The event E¯, representing ‘not E‘, is called the complement of the event E.
What is the probability of drawing a heart from a deck of cards?
There are total 52 cards in a deck out of which 13 cards are of heart.
So the favourable outcomes are 13 and the total no. of events is 52.
If we toss two coins together, then what is the probability of getting at least one head ?
If we toss two coins together then the total outcomes could be The favourable outcomes for at least one head will be
P (for at least one head) =
Find the probability that a leap year selected randomly will have 53 Sundays?
No. of days in a leap year = 366 days = 52 weeks + 2 days
It implies a leap year will have 52 Sundays. In remaining 2 days, possible outcomes are:
Total out comes = 7 Favourable outcomes that Sunday will come in these two days = 2
Required probability =