Question

please solve this question​

Answer 1

Starting number (a) = 200

difference = 250 - 200 = 50

n = 17

last number (l) = a + (n-1)d = 200 + (17 - 1)50 = 200 + 16*50 = 200 + 800 = 1000

Total savings in 17 months = n(a + l)/2 = 17(200 + 1000)/2 = (17*1200)/2 = Rs 10200

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