Question

There are 27 students in Mr. White's homeroom.

What is the probability that at least 3 of them have
heir birthdays in the same month?

Answer 1

0.3935 to 4 places of decimals.

Explanation:

Use binomial probability tables or an online probability calculator.

Here Prob(a singles success) = 0.08333 ( that is 1/12)

Number of successes = 3 and number of trials = 27.

You want the probability of the variable X being >= x.