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?

29

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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

b is 38 degrees.

a is 52 degrees.

this is because if b is 38 and a is 14 degrees more than b than 38+14=52 and 52+38=90 degrees. hope this .

can i see the following ?

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