If each prize is Rs 20 less than its preceding prize, find thevalue of each of the prizes.

 

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Here; d = 20 n = 7 and Sn = 700

Now,

Arithmetic

 

              700 = 7(a + 60)

             100 = a + 60

                 a= 40

Hence, the prizes in ascending order are:

Rs. 40, Rs. 60, Rs. 80, Rs. 100, Rs. 120, Rs. 140 and Rs. 160

 

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