Question

The average of 5 consecutive numbers is n.If the next two numbers are also included,the average will

Answer 1

let x is first no then x,x+1,x+2,x+3,x+4 are consecutive nos

avg of this 5 nos is (x+x+1+x+2+x+3+x+4)/5=n

x+2=n ;n=x+2

add next 2 nos new avg is (x+x+1+x+2+x+3+x+4+x+5+x+6)/7=m

x+3=m ;m=x+3

new avg-old avg=x+3-x-2

=1

increased by 1