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A sum of ₹700 is to …

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A sum of ₹700 is to be used to give seven cash prizes to students of a school for their overall academic performance. If each prize is ₹20 less than its preceeding prize, find the value of each of the prizes

Posted by Nitu Pandey 6 years, 10 months ago

CBSE > Class 10 > Mathematics

1 answers

Ram Kushwah 6 years, 10 months ago

This is an AP

here n=7,d=-20,Sn=700

Sn=7/2(2a+6x-20)=700

7(a-60)=700

a-60=100 ,a=160

So prizes are: 160,140,120,100,80,60,40

1Thank You

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