| Age | 15 | 16 | 17 | 18 | 19 | 20 |
| No of Students | 5 | 8 | 5 | 12 | $x$ | $y$ |
Q68. The frequency distribution of the age of students in a class of 40 students is given below.
\begin{center}
\begin{tabular}{ | l | c | c | c | c | l | l | }
\hline
Age & 15 & 16 & 17 & 18 & 19 & 20 \\
\hline
No of Students & 5 & 8 & 5 & 12 & $x$ & $y$ \\
\hline
\end{tabular}
\end{center}
If the mean deviation about the median is 1.25 , then $4 x + 5 y$ is equal to :\\
(1) 46\\
(2) 43\\
(3) 44\\
(4) 47