Question
A money bag has eight 50 paise coins, seven Rs. 2 coins,
and ten Rs. 10 coins. If one coin falls out and is lost, what is the probability that the lost coin is not a Rs. 2 coin?Solution
Number of Rs. 2 coins = 7
Total number of coins = 8 + 7 + 10 = 25
So, the required probability = 1 - 7/25 = 18/25
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