Question: the average weight of a , b and c is 45 kg . if the average weight of a and b be 40 kg and that of b and c be 44 kg , then the weight of b is :
A) 31 kg
B) 32 kg
C) 33 kg
D) 34 kg
E) none of these
Correct answer: c
Grade: 7 | Topic: Statistics and Probability | Difficulty: Medium | Standard: 7.SP.B.3