A clothing store owner wants to know the proportion of customers who used coupons within the last 2 years. He randomly selects 450 receipts from a database of all purchases within the last 2 years and finds that 49 of them are discounted by coupons.

The proportion of customers who used coupons within the last 2 years is 0.1089.

Step-by-step explanation:

A proportion is the number of desired outcomes divided by the number of total outcomes.

Proportion of customers who used coupons within the last 2 years.

Desired outcomes:

Number of receipts which are discounted by coupons, which is 49

Total outcomes:

Total number of receipts, which is 450

Proportion:

The proportion of customers who used coupons within the last 2 years is 0.1089.

= 5

step-by-step explanation:

to find the 15th term substitute n = 15 into the nth term formula

= (- 3 × 15 ) + 50 = - 45 + 50 = 5