Question

The factory makes light bulbs the probability that a bulb is defective is 1/15 if 300 light bulbs are tested about how many are expected to be defective
a 20

b 66

c 15

d 30

Answer 1

defective : working = 1/15 ( x20 ) 20/300
so the answer is 20 light bulbs

Answer 2

A) you can make a ratio of 1/15 = x/300

300x1 = 300

300/15 = 20