Discussion
Assertion: a shrunk representative fraction is obtained by dividing the nominal fraction by the shrinkage factor. Reason: the sheet has contracted since the drawing was made.
Answer: B
Correct answer: the assertion is false although the reason offered is a true statement in itself
The reason is true - the sheet has contracted - but the arithmetic in the assertion is inverted. The shrunk fraction is obtained by multiplying by the shrinkage factor, which is less than one, so the fraction becomes smaller: 1/1000 at a factor of 0.975 gives about 1/1026. Dividing would make it larger, which is the wrong direction.
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