| The average age of 11 cricket players is 20 yr. If the age of the coach is also included, then the average age increases by 10%, The age of the coach is |
A) 48 yr
B) 44 yr
C) 40 yr
D) 36 yr
Correct Answer: B
Solution :
| Given, average age of 11 players = 20 |
| \[\therefore \] Sum of the ages of players \[=20\times 11=220\] |
| According to the question, |
| \[\frac{220+\text{Coach }\!\!'\!\!\text{ s}\,\text{age}}{12}=20+\frac{20\times 10}{100}\] |
| \[\Rightarrow \] 220 + Coach's age \[=22\times 12=264\] |
| \[\therefore \] Coach's age \[=264-220=44\,yr\] |
You need to login to perform this action.
You will be redirected in
3 sec
