A mixture of 1 parts of A, 3 parts of B , 4 parts of C weight 72 ounces, How many ounces of substance B are in this mixture?
Maths / Average MCQs Math — Multiple-choice practice
- A. 12
- B. 9
- C. 3.4
- D. 17
Correct answer
9
Explanation
Explanation Statement of the given problem, A mixture of 17 parts of A, 3 parts of B, and 4 parts of C weigh 72 ounces. How many ounces of substance B are in this mixture? From above data we get following relations, A/17 = B/3 = C/4 = k (say) …… (1) A + B + C = 72 …… (2) From (1) & (2) we get, 17*k + 3*k + 4*k = 72 or k = 72/24 = 3 …… (3) From (1) & (3) we get, B = 3*3 = 9 (ounces) [Ans]
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