Question

If the mean value of following data is 28, calculate the missing frequency-
Class- 0-10, 10-20, 20-30, 30-40, 40-50, 50-60
Frequency- 12, 18, 27, x, 17, 6.​

Answer 1

Answer:

12 +18+27+x+17+6/6 = 28

x+80 / 6 = 28

x+80 = 28 × 6

x + 80= 168

x = 168 - 80

x = 88

12 +18+27+88 + 17+6/6= 28

168/6 = 28

28 = 28

RHS. = LHS

Step-by-step explanation:

hence proved

I hope it is right