12 defective ballpens are mixed with 132 non- | vedclass

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Question

(A) Total number of defective ballpens = $12$.Total number of non-defective ballpens = $132$.Total number of ballpens in the lot = $12 + 132 = 144$.Th

Vedclass · Accepted Answer

$1/12$

Vedclass · Answer

(A) Total number of defective ballpens = $12$.Total number of non-defective ballpens = $132$.Total number of ballpens in the lot = $12 + 132 = 144$.The probability of selecting a defective ballpen is given by the ratio of the number of defective ballpens to the total number of ballpens.$P(	ext{defective}) = \frac{	ext{Number of defective ballpens}}{	ext{Total number of ballpens}} = \frac{12}{144} = \frac{1}{12}$.Thus,the probability is $\frac{1}{12}$.

$12$ defective ballpens are mixed with $132$ non-defective ballpens. They all look alike. $A$ ballpen is selected at random from that lot. Find the probability that a defective ballpen is selected.

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