Question

Let m be the mid-point and l be the upper-class limit of a class in a continuous frequency distribution. The lower class limit of the class is ______.

पर्याय

• 2m + l

• 2m – l

• m – l

• m – 2l

Answer 1

Let m be the mid-point and l be the upper-class limit of a class in a continuous frequency distribution. The lower class limit of the class is 2m – l.

Explanation:

Given: Mid-point = m

Upper class limit = 1

As, we know that, mid-point = ${\displaystyle \frac{\text{Upper class-limit}+\text{Lower class-limit}}{2}}$

So, ${\displaystyle m=\frac{l+\text{Lower class-limit}}{2}}$

l + Lower class-limit = 2m

Lower class-limit = 2m – l

Hence, the lower class limit of the class is 2m – l.