A) 82%
B) 38%
C) 28%
D) 72%
Correct Answer: C
Solution :
Let \[P(A)=\frac{20}{100}=\frac{1}{5},P(B)=\frac{10}{100}=\frac{1}{10}\] Since, events are independent, so we have to find \[\text{P}\left( \text{A}\cup \text{ B} \right)=\text{P}\left( \text{A} \right)+\text{P}\left( \text{B} \right)-\text{P}\left( \text{A} \right)\text{.P}\left( \text{B} \right)\] \[=\frac{1}{5}+\frac{1}{10}-\frac{1}{5}.\frac{1}{10}=\frac{10+5-1}{50}=\frac{14}{50}\] \[=\frac{14}{50}\times 100=28%\]You need to login to perform this action.
You will be redirected in
3 sec