Question

the average weight of a b and c is 55 kg if the average weight of a and b is 50 kg and that of b and c is 45 kg find the weight of b kg​

Answer 1

a+b+c/3=55kg

a+b/2=50kg--->a=100-b

b+c/2=45kg---->c=90-b

inserting these values in first equation

100-b+b+90-b/3=55

190-2b+b=55×3

190-b=165

-b=-25

b=25kg

Answer 2

Answer:

weight of b is 25 kg

Step-by-step explanation:

average of number is equal to the sum of all number divided by the number of numbers

Here average of a, b, c is 55

i. e. (a+b+c)/3 = 55

so a+b+c = 165