Question

1 8. Let U be the upper class boundary of a class in a frequency distribution and M be the midpoint of the class. Which one of the following is the lower class boundary of the class? O M-U O 2M-U O M+U O2M + U O Option 5​

Answer 1

1643864949868/4868516597,8"8'

Answer 2

Given,

The upper limit of the class$\[ = U\]$

The mid-point of the class$\[ = M\]$

Solution,

Assume that the lower limit is denoted by L.

Therefore, the lower limit of the class is

$\[\begin{array}{l} \Rightarrow M = \frac{{U - L}}{2}\\ \Rightarrow 2M = U - L\\ \Rightarrow L = U - 2M\end{array}\]$

Hence, the correct answer is $\[U - 2M.\]$