If x2 − y2 = 80 and x – y = 8, then the average

Home » Aptitude » Algebra » Question

If x² − y² = 80 and x – y = 8, then the average of x and y is

1. 2
2. 3
3. 4
4. 5

Correct Option: D

x² − y² = 80
x – y = 8

∴ x + y =	x² − y²	=	80	= 10
	x – y		8

∴ Required average =	x + y	=	10	= 5
	2		2