A piggy bank contains hundred 50p coins, fifty 1 coins, twenty 2 coins and ten 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 (i) will be a 50 p coin ? (ii) will not be a ` 5 coin?

Total number of coins in a piggy bank = 100 + 50 + 20 + 10 = 180
(i) Number of 50 p coins = 100
Probability of getting a 50 paise coin = (Number of favorable outcomes)/(Number of total possible outcomes) = 100/180 = 5/9
(ii) Number of ₹ 5 coins = 10
Probability of getting ₹ 5 coin = (Number of favorable outcomes)/(Number of total possible outcomes) = 10/180 = 1/18
Probability of not getting a ₹ 5 = 1 – 1/18 = 17/18