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Soumita Ghosh
- Master | Next Rank: 500 Posts
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value of Z
Source: Beat The GMAT — Problem Solving |
GMAT/MBA Expert
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Ian Stewart
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The answer is 'all of the above'. For example if x=0 and y=1, then z is 60. If x=1 and y=0 then z is 30. If x and y are equal, z is 45. And if you put x and y in a 2 to 1 ratio or a 1 to 2 ratio, you'll get the other two answers. Not a good question, obviously.
For online GMAT math tutoring, or to buy my higher-level Quant books and problem sets, contact me at ianstewartgmat at gmail.com
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