9. Sundar gains 40% by selling 20 chocolates for 1. How many did he buy for $17
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Answer:
we can find the answer by finding the gain that is
40% of 20 + 20
that is 8 + 20
= 28
cost of 20 chocolate = 28
cost of 1 chocolate = 28/20
= $ 1.4
$17 worth of chocolate = 12
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