Question

The average of 3,8,6 and x is 5 and the average of 18,2,6,x and y is 10. What is the value of y?

Answer 1

Answer:

y = 21

Step-by-step explanation:

$\frac{3 + 8 + 6 + x}{4} = 5$

$\frac{17 + x}{4} = 5$

$17 + x = 20$

$x = 3$

Now the average of second set of numbers

$\frac{18 + 2 + 6 + x + y}{5} = 10$

$\frac{26 + 3 + y}{5} = 10$

$29 + y = 50$

$y = 21$