Question

A store gathers some demographic information from their customers. The following chart summarizes the age-related information they collected: Age Number of Customers < 20 98 20-29 89 30-39 67 40-49 75 50-59 95 ≥ 60 83 One customer is chosen at random for a prize giveaway. What is the probability that the customer is at least 40 but no older than 60? What is the probability that the customer is either older than 50 or younger than 30? What is the probability that the customer is at least 60? (Enter your answers as either decimals or fractions, not as percents.)

Answer 1

given that

Age group	Frequency
< 20	98
20-29	89
30-39	67
40-49	75
50-59	95
>60	83
Total	507

N: No.of total customers =507

let X is the number of customers

now

1)

we have to find P(40 <X<60)

2)

we have to find P(X>50,X<30)

now

3)

we have to find P(X>60)

now