4 years ago

Please help me ASAP :)

Mathematics

1 answer:

Ulleksa [173]4 years ago

6 0

B and C are the correct answers

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Answer:

Step-by-step explanation:

Leaving leap years, a year contains 365 days.

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a) Probability that exactly 3 people have same birthday = $\frac{1}{365^3}$

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And hence no of days having exactly 3 persons birthday out of 100 persons is binomial with n = 365 and p = $\frac{1}{365^3}$

Expected value of days = np = $\frac{1}{365^2}$

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