sandy wrote:

The top and bottom of each bar indicate, respectively, the highest and lowest daily number of shirts sold during the month. The heavy line across each bar indicates the average (arithmetic mean) number of shirts sold per day during the month.

The average (arithmetic mean) number of shirts sold per day during February was approximately what percent greater than the average number sold during January?

(A) 10%

(B) 20%

(C) 30%

(D) 40%

(E) 70%

The solid bar denotes the AVERAGE daily shirts sales for that month.

In January, the average was about

25In February, the average was about

35Percent increase = 100(new - old)/old

So, percent increase = 100(

35 -

25)/

25= 100(10)/25

= 40

Answer:

Cheers,

Brent

_________________

Brent Hanneson – Creator of greenlighttestprep.com

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