24 students collected money for donation. The average contribution was Rs.50. Later on, their teacher also contributed some money. Now the a average contribution is Rs.56. The teacher's contribution is:
Show answer & explanation
Correct answer: A
Explanation
The correct answer is Option 1 i.e Rs.200.
| Understanding/Application |
|
Total money contribution of all students = (50 × 24) = Rs.1200 Total money contribution of teacher and all students = (56 × 25) = Rs.1400 |
| Total contribution of teacher = 1400 - 1200 = Rs.200 |