Question

Average of a,b,c is 5 more than the average of b,c,d. Twice of a is 7 less than thrice of d. Find the average of a and d.​

Answer 1

Answer:

44.5

Step-by-step explanation:

As per the information given,

(a+b+c)/3=5+(b+c+d)/3

Multiplying the equation by 5

a+b+c=15+b+c+d

a=15+d--------(1)

Also given that,

2a=3d-7-------(2)

Substituting a from (1) in (2),

2(15+d)=3d-7

30+2d=3d-7

d=37

a=15+d

a=15+37

a=52

Therefore average of a and d is

=(37+52)/2

=89/2

=44.5