Question

The manager of a retail store knows that 40% of the customers who enter the store will purchase one or more items and 60% will leave without making a purchase.what is the probability that in a sample of 10 customers,five will buy one or more items? Here,the population consists of both purchaser and non-purchaser customers.for a sample of 10 customers,find the probability that five will purchase one or more items.How does the sample result look like compared with the population parameter given?
(inferential statistics)

Answer 1

prob(buy) = .4
prob(not buy) = .6

prob(5 of 10 will buy)
= C(10,5) (.4)^5 (.6)^5
= 252(.000796..)
= appr .2007