find the midpoint of AB. A(-9,3), B(7,-8). write an equation perpendicular to AB passes through the midpoint
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we need to find the probability of bad sound cards.
we are having 1000 computers so 1000 sound card will be there.
manager found that 4 sounds are defective out of 1000 sound cards.
of defective sound cards=
we know that 1 is the total probability.out of 0.004 is the failure.