Question

Average income of a & b is 200. And average of c&d is 500. Find the average of a,b c &d ?

Answer 1

Answer:

Step-by-step explanation:

➡️ Average income of and b = a+b/2

➡️ a+b/2 = 200 ___(1)

➡️ Average income of c and d = c+d/2

➡️ c+d/2 = 500__(2)

Adding 1 and 2

We get average

a+b/2 + c+d/2 = 500 + 200

a+b+ c+ d /2 = 700 __(3)

✅ Multiply eq 3 by 2 we get income of a, b, c and d :

income of a, b, c and d =

➡️ a+b+c+d = (500 + 200) ☓ 2

➡️ a + b +c +d = 1400 rs