Q18Multiple choiceExercise 14.3
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 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 bulb?
- (ii)defective bulbs from 2 to 6?
- (iii)defective bulbs less than 4?