Question

a piggy bank contains 100 50paisecoins, 50 1 rupee coins,twenty 2 rupee coins and 10 5 rupee. if it is equally likely that 1 of the coin will fall out when the bank is turned upside down what is probability of getting a) will be a 50pcoin b)will not be a 5 rupee coin

Answer 1

Total no of coins is 100+50+20+10=180
A)no of top coins=100
That means the probability is 10/18
B)Similarly 17/18