Question

Richard bought different number of flowers on different days. The tabular representaion is given as


If the mean of above data is $23$, then what is the number of flowers bought by Richard on Wednesday?

• A. $23$
• B. $10$
• C. $11$
• D. $36$

Answer 1

The correct option is C $11$

The formula used to calculate the mean is given as,

$\text{Mean}=\frac{\text{Sum of all data points}}{\text{Total number of data points}}$.

The mean of the given numbers is $23$ and the total number of data points is 6. Substitute the values in the given formula to calculate the number of flowers bought by Richard on Wednesday, i.e., the value of $x$.

$\begin{array}{cc}23& =\frac{16+30+x+34+12+35}{6}\\ 23\times 6& =127+x\\ 138& =127+x\\ x& =138-127\\ x& =11\end{array}$