A supermarket sells two flavors of cereal: a fruit flavor and a chocolate flavor. In a market survey, the event that a customer says he or she is willing to buy the fruit flavor is considered a success. Records for the past 5 years show that an average of 71% of the customers buy the fruit-flavored cereal. If 20 cereal buying customers walk into the supermarket, what is the probability that at the most 19 of them will buy the fruit-flavored cereal?

Hint: (1 – P(X 19)

Question

A supermarket sells two flavors of cereal: a fruit flavor and a chocolate flavor. In a market survey, the event that a customer says he or she is willing to buy the fruit flavor is considered a success. Records for the past 5 years show that an average of 71% of the customers buy the fruit-flavored cereal. If 20 cereal buying customers walk into the supermarket, what is the probability that at the most 19 of them will buy the fruit-flavored cereal? 

Hint: (1 – P(X > 19)

anonymous · Answer

at most 19 means 1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18  or ,19
 easier to compute the probability that 20 do, then subtract that from 1

anonymous · Answer

i guess that was the hint
you know how to compute the probability all twenty do?

anonymous · Answer

please explain how to do this

anonymous · Answer

@satellite73