En bulbs are randomly selected without replacement from a lot of bulbs some of whichare defective.
(a) if we assume that there are an infinite number of bulbs in the lot and5%of themare defective. what is the probability that at least 2 out of the 10 selected aredefective?
(b) if we know that the lot has not infinite but 120 bulbs, and 12 of them are defective, what is the probability that at least 1 out of the 10 selected is defective?

answer: first option i.e. 'a' is correct.

step-by-step explanation:

since we have given that

number of minutes to wrap a small gift box = 4 minutes

we need to find the number of gifts to be wrapped in 5 minutes

since there is a direct variation, as the number of minutes will increase with   number of gifts to be wrapped.

so, let the number of gifts to be wrapped in 5 minutes be x.

so, it becomes,

hence, first option 'a'   is correct.

answer:

c) the x-coordinate of the center of the circle increases by 3

substitute,

circle 1 = 5

circle 2 = 20

circle 3 = 44

in this case no matter how you add, you will always get a perfect square..

hence proved

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