Question

The numbers 4 and 9 have frequencies x and x-1 respectively . If their arithmetic mean is 6 then x=?

Answer 1

Answer:

hope it is helpful

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Answer 2

Answer:

4/9=x/x-1

4x=9(x-1)

4x=9x-9

4x-9x=-9 given 4x-9x=6

4x-9x=-9+6

-5x=-3

x=-3/5