Question

2. Bulbs are packed in cartons each containing 40 bulbs, seven hundred cartons were
examined for defective bulbs and the results are given in the following table
Number of defective bulbs 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 bulb?
(ii) defective bulbs from 2-6?
(iii) defective bulbs less than 4?​

Answer 1

Answer:

(iii) defective bulbs less than 4