Question

The average weight of a, b, c is 45 kg the average weight of a and b be 40 kg and what top b and c be 43 kg then weight of bs

Answer 1

Answer:31kg.

Step-by-step explanation:

1. If average weight of a,b,c = 45

2. a+b+c=45*3

(As sum=average*number of trials.)

3. a+b+c=135

4. Mean of a and b=40

5. In the same way,a+b=80(40*2)

6. Mean of b and c= 43

7. b+c=43*2=86

8.add (b+c)+(a+b)

9.b+c+a+b=86+80

10. a+2b+c=166

11. Subtract value of (a+b+c) of step from step 10.

12. You will get (a+2b+c)-(a+b+c)=166-135

13. a+2b+c-a-b-c=31

17. You will get b=31 kg.