Question
A piggy bank has seven 25 paise coins, five Rs. 2 coins,
and thirteen Rs. 5 coins. One of the coins fell and got lost. Find the probability that the lost coin is not a Rs. 2 coin.Solution
Number of Rs. 2 coins = 5
Total number of coins = 7 + 5 + 13 = 25
So, the required probability = 1 - 5/25 = 20/25 = 4/5
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