Question

A bag contains $15$ one rupee coins, $25$ two rupee coins and $10$ five rupee coins. If a coin is selected at random from the bag, then the probability of not selecting a one rupee coin is

• A. $0.30$
• B. $0.70$
• C. $0.25$
• D. $0.20$

Answer 1

Answer: (B)

$0.70$

Given: Bag containing $15$ one rupee coin $+25$ two rupee coin$+10$ five rupee coin $=50$ coins in total.

To find: the probability of not selecting a one rupee coin

Sol: The probability of not picking a one-rupee coin is $1$ minus the probability of picking a one-rupee coin.

Hence the required probability $=$ $1-\frac{15}{50}=\frac{35}{50}=0.7$