The following frequency distribution shows the absentee record of class \( X \) students in a term. If the mean of following data is 15.5 , then the missing frequencies \( \mathrm{x} \) and \( \mathrm{y} \) are:
\begin{tabular}{|c|c|c|c|c|c|c|c|c|c|}
\hline \( \begin{array}{c}\text { Number of } \\
\text { days }\end{array} \) & \( 0-5 \) & \( 5-10 \) & \( 10-15 \) & \( 15-20 \) & \( 20-25 \) & \( 25-30 \) & \( 30-35 \) & \( 35-40 \) & Total \\
\hline \( \begin{array}{c}\text { Total } \\
\text { Number of } \\
\text { students }\end{array} \) & 15 & 16 & \( \mathrm{x} \) & 8 & \( \mathrm{y} \) & 8 & 6 & 4 & 70 \\
\hline
\end{tabular}
a. \( x=4 \) and \( y=3 \)
b. \( \mathrm{x}=7 \) and \( \mathrm{y}=7 \)
c. \( x=8 \) and \( y=5 \)
d. \( x=7 \) and \( y=6 \)
📲PW App Link - https://bit.ly/YTAI_PWAP
🌐PW Website - https://www.pw.live
0