A mixture of garbage is composed of 3 elements: by weight, 1/3 of the weight is broken bottles. 3/5 of the garbage is rotten fish, and the remaining 12 pounds of the garbage is waste paper. What is the entire garbage in pounds?
Solution
Correct Answer: Option B
The entire garbage = x
Thus,
x - x/3 - 3x/5 = 12
or, (15x - 5x - 9x) / 15 = 12
or, x = 12 * 15 = 180
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