Math, asked by niranjangullu, 3 months ago

Classes: 0-20 20-40 40-60 60-80 80-100 100-120
Frequency: 20 35 52 44 38 31

Find the mean. Pls don't spam.

Answers

Answered by dikshaagarwal4442
1

Answer:

The mean is 62.54

Step-by-step explanation:

  • Lower limit of every class = l and upper limit = u
  • x = \frac{l+u}{2}  
  • Frequency is represented by 'f'.
  • f*x = fx
  • Table made with the mentioned date:

     Classes                          f                     x                                fx

  1. 0-20                             20                   10                     20*10 = 200
  2. 20-40                           35                   30                    35*30 = 1050
  3. 40-60                           52                   50                    52*50 = 2600
  4. 60-80                           44                   70                    44*70 = 3080
  5. 80-100                          38                   90                    38*90 = 3420
  6. 100-120                         31                    110                    31*110 = 3410
  • ∑f = 20 + 35 + 52 + 44 + 38 + 31 = 220
  • ∑fx = 200 + 1050 + 2600 + 3080 + 3420 + 3410 = 13760
  • Mean = ∑fx/∑f =13760/220 = 62.54
  • So the mean is 62.54

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