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 46 kg, then the weight of B is:	Choose one
A) 17 kg B) 20 kg C) 26 kg D) 31 kg E) 37 kg
let d sum of a, b, c is 3*45= 
<gadget id="calculator">3*45</gadget>
<output>135</output>
135   and sum of a and b s 2*40= 
<gadget id="calculator">2*40</gadget>
<output>80</output>
80   sum of b and c is 2 *46= 
<gadget id="calculator">2 *46</gadget>
<output>92</output>
92   hence 80+92-144=37   ans=37   ANSW37 kgR:37 kg
<result>E</result>
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 46 kg, then the weight of B is: