Question

A kiddy bank contain 50p coins ,fifty 1 rupees coins, twenty 2rupees coins ,and ten 5rupees coins. If it is equally likely that one of the coin will fall out when the bank is turned upside down,what is the probability that the coin (1) will be 50p coins? (2) will not be a rupees 5coin?

Answer 1

total no.of coins in kiddy bank is 130
the probability of getting a 50p coin be 50/130.
The probability of not getting a 5 rupees coin be 120/130.
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