Q7 of 31 Page 308

It is given that in a group of 3 students, the probability of 2 students not having the same birthday is 0.992. What is the probability that the 2 students have the same birthday?

Given in the question that,

Probability of two students who are not having same birthday P () = 0.992


Probability of two students having same birthday P (E) = 1 - P (.)


= 1 - 0.992


= 0.008


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If P(E) = 0.05, what is the probability of ‘not E’?

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A bag contains 3 red balls and 5 black balls. A ball is drawn at random from the bag.

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