CAT 1996 — QA Question 35

Arithmetic ProgressionEasy

Passage / Data

Answer the questions based on the following information.

A series S₁ of five positive integers is such that the third term is half the first term and the fifth term is 20 more than the first term. In series S₂, the n^th term defined as the difference between the (n + 1)^th term and the n^th term of series S₁, is an arithmetic progression with a common difference of 30.

What is the average value of the terms of series S₁?

Answer & solution

Correct answer: 80

A
60
B
70
80
D
Average is not an integer

Solution

Consider the solution to first question of this set.

Average of S₁ = (100 + 60 + 50 + 70 + 120)/5 = 80.

Hence, option (c).

CAT 1996 — QA Question 35

Answer & solution

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