The average weights for Tom,Jack,Rose was 90kg. The average weights for Jack,Rose,John was 100kg. If the weight of John be 50kg, what was the weight of Tom?	Options:
A) 20	B) 44	C) 37	D) 42	E) None of these
Explanation:   T + J + R = 90 × 3 = 270   J+R+J = 100× 3 = 300   20lso, weight of John = 50   Weight of Tom = 270+50-300= 
<gadget id="calculator">270+50-300</gadget>
<output>20</output>
20kg   20nswer: Option 20
<result>A</result>
The average weights for Tom,Jack,Rose was 90kg. The average weights for Jack,Rose,John was 100kg. If the weight of John be 50kg, what was the weight of Tom?