Please guys can you help me this question#
The average weight of three boys is 15 kg.Two of them have the same weight and the third boy has weight of 11 kg. What is the weight of other two boys?
3 answers
15kg-11kg=4 kg, then 4kg divide 2 =2 kg
Once you get an answer, make sure it is reasonable. How can a boy weigh 2kg? And,...
if their average weight is 15, then the sum of their weights is 3*15 = 45
Now you can say
45-11 = 34
now the other two boys weigh 34/2 = 17kg
11,17,17 have an average of 15
if their average weight is 15, then the sum of their weights is 3*15 = 45
Now you can say
45-11 = 34
now the other two boys weigh 34/2 = 17kg
11,17,17 have an average of 15
Does this question need weight of each boy or the weight of two boys altogether when commenting the answer?
2 answers