Question

The average of the first and second of the three members is 15 times higher than the average of the second and third. Distinguish between the second and third of the three.​

Answer 1

let three number be f, s, t

$\frac{f + s}{2} = 15 + \frac{s + t}{2} \\ f + s = 30 + s + t \\ f = 30 + t$

Take s any number and the above equation is satisfied if f = 30 + t is true.