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The temperature of a place at noon on a certain day is 25% h

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The temperature of a place at noon on a certain day is 25% h

by swerve » Mon Dec 02, 2019 1:01 pm
The temperature of a place at noon on a certain day is 25% higher than the temperature of the same place at midnight on the same day. What the temperature of the place at midnight?

1) The temperature of the place at midnight is 20% lower than the temperature of the same place at noon
2) The temperature of the place at noon is 10 units greater than the temperature of the place at midnight

The OA is B

Source: e-GMAT
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Source: — Data Sufficiency |
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by nitink » Tue Dec 03, 2019 11:12 am
From given info, N = 1.25M

from 1, M = 0.8 N, which is the same as the given info, hence not sufficient.

From 2, N =10+ M
using given info , we can solve for M.
Hence, this is alone sufficient.

Answer B.
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