A factory makes car batteries. The probability that a battery is defective is a

If 400 batteries are tested, about how many are expected to be defective?

Answer: 29

Step-by-step explanation:

Heer is the complete question:

A factory makes car batteries. The probability that a battery is defective is 1/14. If 400 batteries are tested, about how many are expected to be defective?

A) 14

B) 371

C) 29

D) 35

Probability that a battery is defective = 1/14

Number of batteries tested = 400

Expected number of defective batteries = Probability that a battery is defective * Number of batteries tested

= 1/14 * 400

= 400/14

= 28.57

= 29 Approximately