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CAT 1994 — QA Question 17

Arithmetic ProgressionEasy
Passage / Data

Answer the next 2 questions based on the following information:

If
md(x) = x ,
mn(x,y) = minimum of x and y and
Ma(a,b,c,...) = maximum of a,b,c…

Fourth term of an arithmetic progression is 8. What is the sum of the first 7 terms of the arithmetic progression?

Answer & solution

  • A

    7

  • B

    64

  • 56

  • D

    Cannot be determined

Solution

Middle term of an A.P. is average of all the terms in A.P.

Number of terms = 7

Average of all these 7 terms = Middle term = Fourth term = 8

Therefore, sum of all the terms = 7 × 8 = 56.

Hence, option (c).

CAT 1994 QA Q17: Fourth term of an arithmetic progression is 8. What is the sum of the first 7 terms of the arithmetic progress — Solution | TheCATExam