Question

average income a and b is 200 and c d is 250 find a b c d average income

Answer 1

If the average income of a and b is 200 this means that a + b / 2 = 200 or, a +  b  = 400.

Similarly c + d = 500.

Therefore, to find the average of income of a, b, c, and d we  add the incomes and divide it by four.

Therefore average income is 400 + 500 / 4 = 225.