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Bunuel
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Active GMAT Club Expert! Tag them with @ followed by their username for a faster response.
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GMAT 1: 640 Q49 V29
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Bunuel
Bob invests 100 dollars in a fund that yields 15% simple interest monthly. If Bob invests the principal in the middle of January, which is the first month will he have more than $200 total?

(A) June

(B) July

(C) August

(D) February

(E) March

Mid Jan - $ 100 - After that we should be adding 15% of simple interest every month

Simple Interest Amount per month = $15

$ 15 * 6 = 90 which means by Mid July we should be having $190

Hence, the first month it will have $200 is August.

Hence, Answer is C
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Bunuel will such questions mention when the interest is calculated??? or some assumption to be done?
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