Does the avg (arith. mean) of a, b, c equal c?
1. c-a = c+b
2. c=0
my answer is 1.
book answer is 3 1 and 2 are sufficent.
my approach
from 1, a+b = 0
mean a+b+c/3 = 0+c/3
since c/3 cannot be equal to c i thought 1 is sufficent.
1. c-a = c+b
2. c=0
my answer is 1.
book answer is 3 1 and 2 are sufficent.
my approach
from 1, a+b = 0
mean a+b+c/3 = 0+c/3
since c/3 cannot be equal to c i thought 1 is sufficent.
