Question

A box contains 300 electrical bulbs out of which 18 are defective. What is the probability that bulb chosen will not be defective?​

Answer 1

Answer:

0.94

Step-by-step explanation:

Bulbs that are defective= 18

Bulbs that are not defective= Total number of bulbs- no. of defective bulbs

= 300-18

= 282

Thus, Probability (bulb chosen will not be defective)= No. of bulbs that are not defective/Total number of bulbs

= 282/300

= 141/150

= 47/50

= 0.94

Answer 2

Answer:

probability of getting defective bulb = 18/300 = 3/50

probability of getting non defective bulb = 1 - 3/50 = 47/50