Question

If a variable assumes 1, 2, 3, 4, 5 with frequencies respectively 1, 2, 3, 4, 5, the
AM is​

Answer 1

Given a : b = 5 : 9

and b : c = 4 : 7

To find a : b : c, the method is to make the numbers pertaining to b in both the ratios equal.

So we multiply the first ratio by 4 and the second by 9.

Then we get a : b = 20 : 36 and b : c = 36 : 63

Therefore a : b : c = 20 : 36 : 63