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The earthworms in sample A have an average length of 2.4 inc
[#permalink]
30 Jul 2018, 09:18

Expert Reply

Question Stats:

The earthworms in sample A have an average length of 2.4 inches, and the earthworms in sample B have an average length of 3.8 inches. The average length of the earthworms in the combined samples is 3.0 inches. Which of the following must be true?

Indicate all such statements.

A. There are more earthworms in sample A than in sample B.

B. The median length of the earthworms is 3.2 inches.

C. The range of lengths of the earthworms is 1.4.

_________________

Indicate all such statements.

A. There are more earthworms in sample A than in sample B.

B. The median length of the earthworms is 3.2 inches.

C. The range of lengths of the earthworms is 1.4.

_________________

Sandy

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Re: The earthworms in sample A have an average length of 2.4 inc
[#permalink]
11 Aug 2018, 14:11

We know that the average length of earthworms is closer to the average length of sample A than sample B, so the number of earthworms in sample A must be greater.

We know nothing about the median of the earthworms.

We know nothing about the range of the length of earthworms, as we know nothing about the minimum or maximum lengths of the earthworms.

The answer is A.

We know nothing about the median of the earthworms.

We know nothing about the range of the length of earthworms, as we know nothing about the minimum or maximum lengths of the earthworms.

The answer is A.

gmatclubot

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