Question

6. 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 preceding prize,
value of each of the prizes.​

Answer 1

Sn=700

n=7

d=-20

Sn=n/2 (2a+(n-1)d)

700=7/2(2a-120)

700/7=a-60

a=160

Prizes were

160

140

120

100

80

60

40

Answer 2

here is your answer read it carefully