If the mean of the following frequency distribution is 65 find the value of R.
Weight (in kg) 60,63,66,72,75
No.of workers 4,5,3,R,2
Answers
Answer:
Value of R is 1.
Step-by-step explanation:
We are given the mean of the following frequency distribution;
Weight (in Kg) - X No. of workers (f) X * f
60 4 240
63 5 315
66 3 198
72 R 72*R
75 2 150
∑f = 14 + R ∑ X*f = 903 + 72*R
Mean formula is given by =
65 =
65(14 + R) = 903 + 72*R
910 + 65*R = 903 + 72*R
72*R - 65*R = 910 - 903
7*R = 7
R = 7/7 = 1
Therefore, value of R is 1.
Answer:
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Step-by-step explanation:
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