Question

What will be the first class interval, if the fifth class interval is $68-72$, the fourth class interval is $64-68$?

• A. $56-60$
• B. $52-56$
• C. $60-64$
• D. $64-68$

Answer 1

The correct option is B

$52-56$

The class intervals will be as follows:
$\begin{array}{cc}\text{1st class interval}& 52-56\\ \text{2nd class interval}& 56-60\\ \text{3rd class interval}& 60-64\\ \text{4th class interval}& 64-68\\ \text{5th class interval}& 68-72\end{array}$
$\therefore$The first class interval is $52-56$