17. A pharmaceutical company receives large shipments of aspirin tablets. The acceptance sampling plan is to randomly select and test 25 tablets. The entire shipment is accepted if at most 2 tablets do not meet the required specifications. If a particular shipment of thousands of aspirin tablets actually has a 6.0% rate of defects, what is the probability that this whole shipment will be accepted?
The probability that this whole shipment will be accepted is
(Round to three decimal places as needed.)
Answer :
randomly select and test tablets = 25
tablets actually has a rate of defects = 6%
=6/100
= 0.06
the probability of non defect = 100 - 0.06
= 0.94
the acceptance will be done when at most two tablets are defective
here
we will calculate the probability of at most 2 tablets
we know that
P(AT MOST 2) = P(0)+P(1)+P(2)
P(0) = 25C0(0.06)^0(0.94)^25
= 0.212
P(1) = 25C1(0.06)^1(0.94)^24
= 0.337
P(2) = 25C2(0.06)^2(0.94)^23
= 0.086
P(AT MOST 2) = 0.212+0.337+0.086
= 0.909
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