A company manufactures calculators in batches of 55 and claims that the rate of defects is 4%. Find the probability of getting exactly 2 defects in a batch of 55 if the rate of defects is 4%. If a store receives a batch of 55 calculators and finds that there are 2 defective calculators, do they have any reason to doubt the company's claimed rate of defects?

A) 0.0181; Yes. If the rate of defects is really 4%, the probability of finding 2 defects in a batch of 55 calculators is very small.
B) 0.546; No. If the rate of defects is really 4%, it is not so unlikely to find 2 defects in a batch of 55 calculators.
C) 0.273; No. If the rate of defects is really 4%, it is not so unlikely to find 2 defects in a batch of 55 calculators.
D) 0.262; No. If the rate of defects is really 4%, it is not so unlikely to find 2 defects in a batch of 55 calculators.

Question

A company manufactures calculators in batches of 55 and claims that the rate of defects is 4%. Find the probability of getting exactly 2 defects in a batch of 55 if the rate of defects is 4%. If a store receives a batch of 55 calculators and finds that there are 2 defective calculators, do they have any reason to doubt the company's claimed rate of defects?

A) 0.0181; Yes. If the rate of defects is really 4%, the probability of finding 2 defects in a batch of 55 calculators is very small.
B) 0.546; No. If the rate of defects is really 4%, it is not so unlikely to find 2 defects in a batch of 55 calculators.
C) 0.273; No. If the rate of defects is really 4%, it is not so unlikely to find 2 defects in a batch of 55 calculators.
D) 0.262; No. If the rate of defects is really 4%, it is not so unlikely to find 2 defects in a batch of 55 calculators.

Quizplus · Accepted Answer

The Answer of A company manufactures calculators in batches of 55 and claims that the rate of defects is 4%. Find the probability of getting exactly 2 defects in a batch of 55 if the rate of defects is 4%. If a store receives a batch of 55 calculators and finds that there are 2 defective calculators, do they have any reason to doubt the company's claimed rate of defects?

A) 0.0181; Yes. If the rate of defects is really 4%, the probability of finding 2 defects in a batch of 55 calculators is very small.
B) 0.546; No. If the rate of defects is really 4%, it is not so unlikely to find 2 defects in a batch of 55 calculators.
C) 0.273; No. If the rate of defects is really 4%, it is not so unlikely to find 2 defects in a batch of 55 calculators.
D) 0.262; No. If the rate of defects is really 4%, it is not so unlikely to find 2 defects in a batch of 55 calculators.

A Company Manufactures Calculators in Batches of 55 and Claims