Question

A bulb manufacturer packs 80 bulbs in each box. Some bulbs from 18 boxes were tested
defective. The number of defective bulbs in 18 boxes is given below.
No. of defective bulbs No. of boxes
0-3
3
3 -6
3
6-9
9-12
12 - 15
a.
b.
Find the number of boxes which contain maximum number of defective bulbs.
If a box is selected at random, what is the probability that it will contain 3 - 6 defective
bulbs?
Find the probability of getting least number of defective bulbs.
Find the mean of defective bulbs.
c.
d.​

Answer 1

Answer:

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