A piggy bank contains hundred 50p.coin,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 ..
(a) will be a 50p coin,
(b) will not be a ₹ 5 coins.