Source: Official Guide for the GMAT 13th Ed. Problem Solving; #25 Official Guide for the GMAT 2015 14th Ed. Problem Solving; #25

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3

Of the 50 researchers in a workgroup,

Of the 50 researchers in a workgroup, 40 percent will be assigned to Team A and the remaining 60 percent to Team B. However, 70 percent of the researchers prefer Team A and 30 percent prefer Team B. What is the lowest possible number of researchers who will NOT be assigned to the team they prefer?

2 Explanations

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1

Since 50 is 100/2, the given percentages divided by 2 correspond to the # of researchers in each group.

Current Situation:

# researchers in Team A: 20
# researchers in Team B: 30

Desired Situation by researchers:

# researchers prefer Team A: 35
# researchers prefer Team B: 15

Since the problem ask as for the "lowest # of researchers unhappy with their respective team"(extreme situation), we can operate:

35 - 20 = 15

or just:

30 - 15 = 15

So, the correct answer is (A).

Jan 24, 2015 • Comment

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3

Mike McGarry, Magoosh Tutor

Dec 27, 2013 • Comment

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