Bunuel wrote:

During a 31-day month that started on a Sunday, daily collections were made. The collections averaged 180 dollars per day on weekdays and 286 dollars per day on weekends. Which of the following was nearest the average (arithmetic mean) collection per day for the month?

A. 94

B. 185

C. 210

D. 233

E. 250

Since the answers are far apart, we'll estimate the answer.

This is an Alternative approach.

Let's look at 1 full week - 7 days.

Then the total collection is 180*5 + 286*2 = 900 + 572 = 1472.

Divided by 7 gives about $210 per day.

Since our month contains 4 full weeks and a few extra days, our estimate should be very close to the answer.

Looking at our options, we'll pick (C).

_________________

David

Senior tutor at examPAL

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