Question

on an average the number of defective items in a box is 2. if there are 100 such boxes in how many of them would you expect at least two defective items?

Answer 1

I expect in all 100 boxes

Answer 2

Answer:

59 in 100 boxes can expect at least 2 defective items

Explanation:

(for more explanation refer image attached)

probability (atleast 2 defective) =p(x>=2)

=p(sure event)-p(x<2)

=1-[p(x=0)+p(x=1)]

=1-0.406005850

=0.593994150

That is,59.3994150 noxes have chance ,

since number of boxes should be a countable number

we have

~ 59

that is 59 of 100 have probability to have atleast 2 defective items.

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