Question

A box contains 28 bulbs of which 7 bulbs are defective, a is drawn randomly from the box find the probability of picking a non defective bulb

Answer 1

Answer:28 - 7 = 21    so the no. of non defective bulbs are 21 . so the probability of drawing out a non defective bulb = 21/28

Explanation:

Answer 2

Answer:

Explanation:

21/28=3/4