Question

Bulbs are packed in cartons each containing 40 bulbs. 700 cartons were examined for the

defective bulbs and the results are given in the following table

Number

of

defective

bulbs

0 1 2 3 4 5 6 More

than 6

Frequency 400 180 48 41 18 8 3 2

One carton was selected at random. What is the probability that it has

i. No defective bulbs

ii. Defective bulb from 2 to 6?

iii. Defective bulbs less than 4?​

Answer 1

Answer:

defective bulbs less than 4