In a group of 68 students, each student is registered for at least one of three classes - History, Math and English. Twenty-five students are registered for History, twenty-five students are registered for Math, and thirty-four students are registered for English. If only three students are registered for all three classes, how many students are registered for exactly two classes?
a. 13
b. 10
c. 9
d. 8
e. 7
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shankar.ashwin
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Subtracting people who registered for all 3,
(25-3) + (25-3) + (34-3) = 75.
People registered for all 3 = 3
Therefore only 2 = (75 + 3) - 68 = 10
(25-3) + (25-3) + (34-3) = 75.
People registered for all 3 = 3
Therefore only 2 = (75 + 3) - 68 = 10
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Followed here and elsewhere by over 1900 test-takers.
I have worked with students based in the US, Australia, Taiwan, China, Tajikistan, Kuwait, Saudi Arabia -- a long list of countries.
My students have been admitted to HBS, CBS, Tuck, Yale, Stern, Fuqua -- a long list of top programs.
As a tutor, I don't simply teach you how I would approach problems.
I unlock the best way for YOU to solve problems.
For more information, please email me (Mitch Hunt) at [email protected].
Student Review #1
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