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A kiddy bank contains hundred 50p coins,...

A kiddy bank contains hundred 50p coins, fifity Rs1 coins, twenty Rs2 coins and ten Rs5 coins. IF it is equally likely that one of the coins will fall out when the bank is turned upside down, what is the probability that the coin will not be a 50 p coin?

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The correct Answer is:
`(5)/(9)`
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