Quantitative Aptitude Ques 1581
Question: Find the sum of all positive multiples of 3 less than 50.
Options:
A) 400
B) 404
C) 408
D) 412
Show Answer
Answer:
Correct Answer: C
Solution:
- Multiples of 3 up to 50 are 3, 6, 9,12,…, 42, 45, 48 The terms form an AP consisting 16 terms.
$ \therefore $ Sum of $ AP=\frac{n}{2}(a+l) $ Here, $ n=16, $ $ a=3, $ $ l=48 $
$ \Rightarrow $ Sum of AP $ =\frac{16}{2}(3+48)=8\times 51=408 $
BETA
