Question

Find the mode if
c.I
o-10
10-20
20-30
30-40
40-50

and frequency

20
24
40
36
20​

Answer 1

modal class = 20-30

mode =

$\frac{f1 - f0}{2f1 - f0 - f2} \times h + l$

mode = (40 - 24/80-24-26)10 + 20

mode = (16/80-50)10 + 20

= 16/3 + 20

= 5.34 + 20

= 25.34 approximate.