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Problem Solving (PS) | On a particular test whose scores are distributed normally, the 2nd pe

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Gnpth wrote:

On a particular test whose scores are distributed normally, the 2nd percentile is 1,720, while the 84th percentile is 1,990. What score, rounded to the nearest 10, most closely corresponds to the 16th percentile?

(A) 1,750
(B) 1,770
(C) 1,790
(D) 1,810
(E) 1,830

Attachment:
normdist.png
normdist.png [ 13.13 KiB | Viewed 14 times ]

Answer
Quickly sketch a normal distribution: 0 -----2-----16-----50-----84------96------100

A score at 84th percentile is three standard deviations away from a score at 2nd percentile

1,990 - 1,720
...

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