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Find the sum of all the 11 terms of an AP whose middle most term is 30.

Find the sum of all the 11 terms of an AP whose middle most term is 30.

Grade:10

1 Answers

Harshit Singh
askIITians Faculty 5963 Points
3 years ago
Dear Student

Given
middle most term = 30
6thterm = 30
let middle most term i.e 6th term ,a=30
then AP will be a-5d,a-4d,a-3d,a-2d,a-d,a,a+d …...a+5d

Sum of all terms = 11a
sum = 330

Thanks

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