A student spent 1/5 of his allowance on books, 1/2 of rem...
A student spent 1/5 of his allowance on books, 1/2 of remainder on food and kept the rest for contingencies. What fraction was kept?
7/15
8/15
2/5
4/5
Correct answer is C
Let his allowance = y.
Books=y5
Remainder:y−y5=4y5
Food:12×4y5=2y5
Contingencies:4y5−2y5=2y5
Therefore, he kept 25 of his allowance for contingencies.
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