Question
In: Math
Thirty percent of all customers who enter a store will make a purchase. Suppose 10 customers...
Thirty percent of all customers who enter a store will make a purchase. Suppose 10 customers enter the store, and that they make independent purchasing decisions.
(a) Let X be the number, out of the 10 customers in the store, who will make a purchase. Write the binomial probability density function for this situation.
(b) Use the binomial distribution to calculate the probability exactly 5 customers make a purchase.
(c) Find the probability that 4 or fewer customers make a purchase.
(d) Find the probability that 7 or more customers make a purchase.
Solutions
Expert Solution
Solution:
We are given:
(a) Let X be the number, out of the 10 customers in the store, who will make a purchase. Write the binomial probability density function for this situation.
Answer: 
(b) Use the binomial distribution to calculate the probability that exactly 5 customers make a purchase.
Answer: We have to find 
(c) Find the probability that 4 or fewer customers make a purchase.
Answer: We have to find 
(d) Find the probability that 7 or more customers make a purchase.
Answer: 
milcah answered 7 months agoRelated Solutions
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