Question 4 the day : February 18, 2003
The question for the day is from the topic Arithmetic Progression. It is about finding a particular term of an AP given the sum of two other terms of the same AP

Question
The sum of third and ninth term of an A.P is 8. Find the sum of the first 11 terms of the progression.

(1) 44
(2) 22
(3) 19
(4) None of these

Correct Answer is 44 and Correct Choice is (1)

Explanatory Answer

The third term t₃ = a + 3d
The ninth term t₉ = a + 8d
t₃ + t₉ = 2a + 10d = 8

Sum of first 11 terms of an AP is given by

Question on finding sum of terms of a GP, Problem on finding a particular term of an AP, given sum of two other terms, Summation of AP having negative common difference, Finding terms of an AP, given sum and product of some of its terms, Sum of series of numbers in arithmetic progression, A CAT 2003 question to find sum of terms of an AP

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