Question

In the given series how many times the number ${}^{\prime }{6}^{\prime }$ is followed by the number ${}^{\prime }{8}^{\prime }$ but ${}^{\prime }{8}^{\prime }$ should not be followed by ${}^{\prime }{1}^{\prime }$?
$2,5,3,6,8,4,9,6,8,1,5,1,6,8,7,5,6,2,7,5,3,6,8,3,7,6,8,1,5,6,8$

• A. $1$
• B. $2$
• C. $3$
• D. $4$

Answer 1

The correct option is D $4$

In the given series, $5$ times $6$ is followed by $8$ and from which $8$ is followed by $1$ only $1$ time.

So, total $4$ times $6$ is followed by $8$ where $8$ is not followed by $1$.

Hence, option D is correct.