Question

. The average of the first and the second of
three numbers is 20 more than the average of
the second and the third of these numbers.
What is the difference between the first and
the third of these three numbers?​

Answer 1

Step-by-step explanation:

Let e\the three numbers be a,b and c

∴A.t.Q:−(

2

a+b

)−(

2

b+c

)=15

2

a+b−b−c

=15

2

a−c

=15

∴a−c=30

∴ Difference b/w 1

st

and 3

rd

no. ie a−c=30