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Question
A piggy bank contains hundred 50 p coins, fifty Rs 1 coins, twenty Rs 2 coins and ten Rs 5 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 be a 50 p coin?
Solution
Total number of coins in a piggy bank = 100 + 50 + 20 + 10 = 180
∴ Total possible outcome = 180
For a 50 p coin:
Favourable outcomes = 100
∴ p (50 p) = `"Favourable outcomes"/"Total possible outcomes"=`
`= 100/180 `
`= 5/9`
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