QuantProblem Solving

Free GMAT Problem Solving Practice Question

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A store recorded its Monday sales by department as follows: electronics $400, clothing $300, books $100, and home goods $200. Clothing sales were what percent of the store's sales in all departments other than electronics?

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Answer & Explanation

Correct answer

C

All departments other than electronics means clothing, books, and home goods: 300 + 100 + 200 = 600. Clothing is 300, so 300/600 = 50 percent. So the answer is C.

Dividing by the full $1000 total with electronics included gives 30 percent (choice B), but the stem explicitly excludes electronics, so the base must be 600.

Choice D, 60, drops books and divides clothing by the clothing-plus-home-goods base of 500 (300/500); choice E, 75, uses a clothing-plus-books base of 400 (300/400); choice A, 25, keeps the correct 600 base but halves clothing to 150 in the numerator (150/600).