Y is a Binomial random variable where, Y = The number of days in a week...

Y is a Binomial random variable where, Y = The number of days in a week someone goes to the gym.

Where a week has 7 days and the probability of someone going to the gym on any given day is .65. What is the probability that someone goes to the gym at least 3 days out of the week?

Hint: This is a cumulative probability, so you need to add up the probabilities of Y equaling all the possible values up to and including 3.

P(Y <= 3) = ?

(A) 0.2627

(B) 0.4694

(D) 0.4718

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