Question

Frequency Polygon mark obtained 0-10,10-20,20-30,30-40,40-50,50-60-70,70-80 7,10,6,8,12,3,2,2.

Answer 1

Answer:

class class mark frequency FiXi

o-10 5 7 35

10-20 15 10 150

20-30 25 6 150

30-40 35 8 280

40-50 45 12 540

50-60 55 3 165

60-70 65 2 130

70-80 75 2 150

N=50 €fixi=1600

Step-by-step explanation:

mean=€fixi÷N

1600÷50

32

*Therefore the mean is 32