Question

Fill in the blanks-
In a frequency distribution, the first and the second classes are 0-10 and 10-20 respectively. If the class size is same then the lower limit of the fourth class is__________.

Answer 1

In the given classes, the class size
= upper limit $-$ lower limit
= 10 $-$ 0 = 10

Hence the first four classes are,

1st class interval	0-10
2nd class interval	10-20
3rd class interval	20-30
4th class interval	30-40

The fourth class is 30-40. Hence, the lower limit of the fourth class is 30.