Question

Fin the mean of x, x+2, x+4, x+6, x+8.​

Answer 1

Step-by-step explanation:

mean = 11

But mean of x,x+2, x+ 4, x+6, x+8

$\frac{x+x+2+x+4+x+6+x+8}{5}$

$\frac{5x+20}{5} =x+4$

$x+4=11\\x=11-4=7$

Numbers are 7,9,11,13,15

Now mean of first 3 numbers 7,9,11

$\frac{7+9+11}{3} = \frac{27}{3} =9$