Question

Say, 3 customers enter a store. On the basis of past experience, the store manager estimates the probability that any one customer will make a purchase is 0.30. What is the probability that two of the next three customers will make a purchase?

Answer 1

The probability that two of the next three customers will make a purchaseis mathematically given as

P(1) =0.441

What is the probability that two of the next three customers will make a purchase?

Generally, the equation for Probablity is  mathematically given as

A)

P(1) = 3 C 1 (0.3)^1 (0.7)^2

P(1) =0.441

B)

n=1000

E (x) =np = 1000x0.3

E (x) =3.00

C)

Variance= mpq

Variance= 300 x0.7

Variance= 210

In conclusion,

P(1) =0.441

E (x) =3.00

Variance= 210

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