Question

If the average of a,b,c,d is the average of b and c, then the value of a-b-c+d is___.

Answer 1

Answer:

0

Step-by-step explanation:

(a+b+c+d)/4=(b+c)/2

a+b+c+d=2b+2c

a+d=b+c

We could replace a+d by b+c because a+d=b+c

a-b-c+d=b+c-b-c=0