Question 66

The average of 4 numbers is 9. If another number 14 is included, then what is the new average?

Solution

let w,x,y,z be the 4 numbers

Avg=$$ \frac{w+x+y+z}{4}$$=9

w+x+y+z=36

New no.v=14

Avg of 5 no is = $$\frac{w+x+y+z+v}{5}$$

=$$\frac { 36+14}{5}$$

= 10

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