Question

The class marks of a frequency distribution are given as 12, 16, 20 ………. The class corresponding to the class marks 16 is * a) 12 – 16 b) 16 – 20 c) 18.5 – 22.5 d) 14 – 18

Answer 1

Answer: c) 18.5 - 22.5 is u're answer

Answer 2

Answer:

Width=5

Class marks=20

∴Lower limit=20−

2

5

⇒

2

40−5

=

2

35

=17.5

Upper limit=20+

2

5

⇒

2

40+5

=

2

45

=22.5

Hence the class corresponding to the class mark 20 is 17.5−22.5.