Saved Bookmarks
| 1. |
Assumed 700 is to be used yo give seven of their academic performance if each prize is 20 less than the other, find the value of first prize. |
|
Answer» Let first prize is xSecond is x-20Similarly seventh will be x-6(20)Sum of prizes =700It forms AP with a=x d=-20 and s7=700s7=(7/2)[2x+(7-1)(-20)]700=(7/2)[2x+(6)(-20)]200=[2x-120]200+120=2x320=2xx=160So the first prize is 160Rs |
|