Question

it is know that a box 800 electric blub contain 36 defective blub. one blub is taken at random out of the box .what is the probability that the blub chosen is non - defective

Answer 1

Total number of bulbs = 800

Number of defective bulbs = 36

Number of non-defective bulbs = 800 - 36 = 764

Probability = 764/800 = 191/200 = 0.95