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An arithmetic progression has 10 terms. Sum of the 10 terms is 220. Sum of the odd terms is 100. Find the first term and common difference. pl give me the answer.

2 answers

10/2 (2a+9d) = 220
5/2 (2a+4*2d) = 100

sir,
I get the answer
First term = 18.4 common difference = 4/5
is it correct ?

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