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If the productivity of a brigade grows by 10% when the

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by M7MBA » Tue Jun 25, 2019 2:46 am

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Answers

A

B

C

D

E

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Difficulty—

If the productivity of a brigade grows by 10% when the number of the workers in the brigade is increased by one, then which of the following is closest to the ratio of the productivity of a 12-person brigade to that of a 10-person brigade?

A. 0.21
B. 0.82
C. 1.20
D. 1.21
E. 1.44

The OA is the option _D_

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by Scott@TargetTestPrep » Mon Jul 01, 2019 4:12 pm
M7MBA wrote:If the productivity of a brigade grows by 10% when the number of the workers in the brigade is increased by one, then which of the following is closest to the ratio of the productivity of a 12-person brigade to that of a 10-person brigade?

A. 0.21
B. 0.82
C. 1.20
D. 1.21
E. 1.44

The OA is the option _D_

Source: GMAT Club Test
We can let a 10-person brigade's productivity be 100; thus, a 11-person brigade's productivity will be 100 x 1.1 = 110, and a 12-person brigade's productivity will be 110 x 1.1 = 121. Therefore, the ratio is 121/100 = 1.21.

Answer: D

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