CAT 1994 — QA Question 17
Arithmetic ProgressionEasy
Fourth term of an arithmetic progression is 8. What is the sum of the first 7 terms of the arithmetic progression?
Answer & solution
Correct answer: 56
- 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).