nkmungila wrote:

In a group, 90% members drink at least one of the three drinks Tea, Coffee, and Latte. 60% members drink at least two of

the three drinks and 20% members drink all three. What is the percentage of members who drink exactly one or two of the

three drinks?

A) 50

B) 60

C) 70

D) 80

E) 90

Source:

http://www.expertsglobal.comDear

nkmungila,

I'm happy to respond.

First of all, the math here is relatively easy. The "drink all three group" is 20%. The 60% for "at least 2" includes this, so 40% drink exactly two drinks. Both of these groups, the 20% who drink exactly 3 drinks and the 40% who drink exactly 2 drinks, are included in the 90%. 90 - 20 - 40 = 30% drink exactly one drink. The sum of "exactly one" and "exactly two" is 30 + 40 = 70%. OA =

(C).

Also, I will say that the grammar in the prompt is very poor. I am not convinced that the person who wrote the question had a complete understanding of the English language. On the GMAT, every single prompt in the Quant section is grammatically flawless.

Does all this make sense?

Mike

_________________

Mike McGarry

Magoosh Test Prep

Education is not the filling of a pail, but the lighting of a fire. — William Butler Yeats (1865 – 1939)