Question

The probability of getting flu after receiving the flu shot is
15%. Suppose that 8 people receive flu shots in our
department.

a. What is the probability that exactly 5 of them gets flu?
(2.5 points)

b. What is the probability that at least one person gets flu?
(2.5 points)

Answer #1

**PLEASE RATE THE
ANSWER**

Answer

Probability of getting a flue is 0.15 ( EVENT A)

Probability of not getting a fluw fter shot is (1-0.15 ) = 0.85
(EVENT B)

**a. What is the probability that exactly 5 of
them gets flu?**

= probability of 5 getting a flue * probability of 3 not getting
the flue

= A^{5} B^{3}

= 0.15^{5} * 0.85^{3}

**b. What is the probability that at least one person gets
flu?**

= 1 - ( probability that no one gets the flu)

= 1 - B^{8}

= 1- 0.85^{8}

= 1-.272490

= 0.7275

= 72.75 %

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