Source: Official Guide for GMAT Review 2016 Problem Solving; #134

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6

Four extra-large sandwiches of exactly the same

Four extra-large sandwiches of exactly the same size were ordered for m students, where m > 4. Three of the sandwiches were evenly divided among the students. Since 4 students did not want any of the fourth sandwich, it was evenly divided among the remaining students. If Carol ate one piece from each of the four sandwiches, the amount of sandwich that she ate would be what fraction of a whole extra-large sandwich?

1 Explanation

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5

Nha Ha

For for the first three sandwiches it would be equal to saying Carol ate 3/m pieces. From the fourth sandwich she ate 1/m-4.

From here we would add the totals, multiply through with a common denominator and simplify.

Jan 25, 2016 • Comment

Joshua Czerniejewski

I think you meant to say Carol ate 3/m pieces plus 1/(m-4).

Dec 30, 2017 • Reply

David Recine, Magoosh Tutor

Good catch, Joshua; you're right about that. I'm going to make a quick edit to Nha Ha's original explanation. :)

Jan 1, 2018 • Reply

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