SOLUTION: A bag contains 15 one rupee coins, 25 two rupee coins and 10 five rupee coins. If a coin is selected at random from the bag, then the probability of not selecting a one rupee coin

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Question 1034026: A bag contains 15 one rupee coins, 25 two rupee coins and 10 five rupee coins. If a coin is selected at random from the bag, then the probability of not selecting a one rupee coin is
Answer by fractalier(6550) About Me  (Show Source):
You can put this solution on YOUR website!
The probability of not picking a one-rupee coin is ONE minus the probability of picking a one-rupee coin.
That probability is 15/50, or 3/10.
Thus the probability we need is 1 - 3/10 = 7/10 or .7