Question

The class-mark of the modal class for the following distribution is: [1]

Classes 0 – 5 5 – 10 10 – 15 15 – 20 20 – 25
Frequency 10 15 12 20 9
(a) 15 (b) 20 (c) 17.5 (d) 35

pls help

Answer 1

Answer:

modal class is that class whose frequently if highest

here, modal class is 15 - 20

therefore class mark.is (15+20)/2

= 35/2

= 17.5

Option C

Answer 2

Answer:

Classes 0 – 5 5 – 10 10 – 15 15 – 20 20 – 25

Frequency 10 15 12 20 9

Step-by-step explanation:  Class mark = lower limit + upper limit/2

15+20/2 = 35/2 = 17.5

Option(c) is correct