Question
A coin collection includes six Rs. 1 coins, six Rs. 2
coins, and twelve Rs. 10 coins. One coin goes missing. Find the probability that the lost coin is not a Rs. 10 coin.Solution
Number of Rs. 10 coins = 12
Total number of coins = 6 + 6 + 12 = 24
So, the required probability = 1 - 12/24 = 12/24 = 1/2
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