1. Tardigrade
  2. Question
  3. Mathematics
  4. The arithmetic mean of the following data is 7 . Find (a+b). x f 4 a 6 4 7 b 9 5

Q. The arithmetic mean of the following data is 7 . Find .
x f
4 a
6 4
7 b
9 5

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Solution:

Use the arithmetic mean formulae for descreate series.