Question

find the mean of the following frequency distribution class marks 0 to 20 20 to 40 40 to 60 60 to 80 80to100frequency 17 28 32 24 19​

Answer 1

Answer:50

Step-by-step explanation:

Answer 2

class. class. frequency. x f
mark=x. =f

0-20. 10. 17. 170

20-40. 30. 28. 840

40-60. 50. 32. 1600

60-80. 70. 24. 1680

80-100. 90. 19. 1710

Σf=120. Σxf=6000

now,

$\frac{}{x} = \frac{Σxf}{Σf}$

$\frac{6000}{120} = 50$

therefore,

mean of the given frequency table is 50.