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"A piggy bank comprises 5-rupee coins, 10-rupee coins, and 20-rupee coins. The quantity of 5-rupee coins in the piggy bank is 75% more than the number of 20-rupee coins and 30% less than the number of 10-rupee coins. If two coins are randomly drawn from the piggy bank, the probability of drawing a 5-rupee coin and a 10-rupee coin is 1/3. Determine the total number of coins in the piggy bank."

A 25

B 18

C 21

D 50

E 12

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