4GMAT - GMAT Online Practice Test
 

GMAT Questions Mailing List - Y! Groups Algebra Arithmetic and Geometric Progressions Arithmetic Mean, Median, Mode, Deviation Inequalities Data Sufficiency Geometry Mensuration Number Systems Percentages Permutation and Combination, Probability Profit & Loss Quadratic Equations Ratio, Proportion, Variance Set Theory Simple & Compound Interest Speed, Time, Distance Work & Time, Pipes & Cisterns

Averages - June 11, 2004

The GMAT Sample Math question for the day is from the topic Averages.

Question
The average wages of a worker during a fortnight comprising 15 consecutive working days was $ 90 per day. During the first 7 days, his average wages was $ 87/day and the average wages during the last 7 days was $ 92 /day. What was his wage on the 8th day?

A. $83
B. $92
C. $90
D. $97
E. $104

The correct choice is (D) and the correct answer is $97.

Explanatory Answer
The total wages earned during the 15 days that the worker worked = 15 * 90 = $ 1350.

The total wages earned during the first 7 days = 7 * 87 = $ 609.
The total wages earned during the last 7 days = 7 * 92 = $ 644.

Total wages earned during the 15 days = wages during first 7 days + wage on 8th day + wages during the last 7 days.

=>     1350 = 609 + wage on 8th day + 644
=>     wage on 8th day = 1350 – 609 – 644 = $97.
Copyright 2004-06 4GMAT.COM, Test Catalyst (India) Private Limited - all rights reserved
GMAT™ and GMAC™ are registered trademarks of the Graduate Management Admission Council™. The Graduate Management Admission Council™ does not endorse, nor is it affiliated in any way with the owner or any content of this web site.