Question

Out of three given number,the first no.is twice of second and thrice of third .if the avg.of three no.is 154.what is difference between first and third number

Answer 1

Let the first no. be x

Then,second no.=x/2

Third no.=x/3

now (x+x/2+x/3)/3=154

x+x/2+x/3 =3×154

(6x+3x+2x)/6=3×154

11x=6×3×154

11x=2772

x=2772/11 =252

second no.=252/2=126

third no.=252/3=84

Diff between first and third no.=252-84=168 ans