A company is studying the number of daily debit card purchases. There were 20 purchases and the probability of a debit card purchase is 0.5. Of the 20 purchases, what is the expected value of the number of debit card purchases?
A) 4
B) 6
C) 8
D) 10
E) 12

Question

Quizplus · Accepted Answer

The expected value of the number of debit card purchases is calculated by multiplying the total number of purchases by the probability of a debit card purchase. Thus, $20 \times 0.5 = 10$.

A Company Is Studying the Number of Daily Debit Card