Question

A piggy bank contains hundred 50 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 : 

(i) Will be a 50 p coin ? 

(ii) Will not be a Rs 5 coin ? 

(iii) Which mathematical concept is used in the above problem ? 

(iv) Which value is discuss above ?

Answer 1

(i) Total number of coins = 100 + 50 + 20 + 10

= 180

.'. Total number of possible outcomes of a coin will fall out = 180 

Number of 50 p coins = 100

.'. Number of favourable outcomes relating to fall out of a 50 p coin = 100

.'. P(of getting a 50 p coin)

(iii) Probability

(iv) Saving money for future.