Number Series Ques 116
Question-
What will come in place of the question mark (?)
$S_{1}$ is an ascending series of 5 positive numbers, where in the difference between two consecutive numbers of $S_{1}$ is 3 . The lowest number of $S_{1}$ is 13 . If the 2 nd highest number of $S_{1}$ is 2 more than the lowest number of another series of 4 consecutive positive numbers $\left(S_{2}\right)$, what is the average of $S_{2}$ ?
(1) 21.5
(2) 26
(3) 22.5
(4) 23
(5) 23.4
(IBPS Bank PO/MT CWE-VII (Prelim Exam) 14.10.2017)
Show Answer
Correct Answer: (1)
Solution: (1)
Numbers of series $S_{1}$ $\Rightarrow 13,16,19,22$ and 25
According to the question,
The lowest number of the series $S_{2}$ $=22-2=20$
Numbers of series $S_{2}$ $\Rightarrow 20,21,22 $ and $23 $
$\therefore \quad$ Required average $=\frac{20+21+22+23}{4}$ $=\frac{86}{4}=21.5$
BETA
