Question

A purse contains a number of Rs.$1$, Rs. $2$, and Rs. $5$ coins as given below.

Rs. 1	Rs. 2	Rs. 5
10	14	14

If from the purse a coin is taken at random, then find the probability that the coin
(i) is not a Rs. $1$ coin.
(ii) is a Rs. $3$ coin?

Answer 1

$\left(1\right)P(notRs.1coin)=P(Rs.2coin)+P(Rs.5coin)=\left(\frac{14}{10+14+14}\right)=\left(\frac{14}{10+14+14}\right)=(\frac{28}{38}=(\frac{14}{19}\left)\right)\left(2\right)P(Rs.3coin)=\left(\frac{0}{10+14+14}\right)=0$