The average weight of three men A, B and C is 84 Kg. The average weight becomes 80 Kg when D joins them. If E whose weight is 3 Kg more than D joins the group replacing A, then the average weight of B, C, D and E becomes 79 Kg. The weight of A is:	Choices.
A) 65kg B) 70kg C) 75kg D) 80kg E) 85kg
Wt of AB75kg = 84*3= 
<gadget id="calculator">84*3</gadget>
<output>252</output>
252 kg   wt of AB75kgD= 80*4= 
<gadget id="calculator">80*4</gadget>
<output>320</output>
320 kg   wt of D= 68 kg   wt of E = 71 kg   wt of AB75kgDE = 320+71= 
<gadget id="calculator">320+71</gadget>
<output>391</output>
391 kg   wt of B75kgDE= 79*4= 
<gadget id="calculator">79*4</gadget>
<output>316</output>
316 kg   wt of A= 391-316= 
<gadget id="calculator">391-316</gadget>
<output>75</output>
75 kg   ANSWER:75kg
<result>C</result>
The average weight of three men A, B and C is 84 Kg. The average weight becomes 80 Kg when D joins them. If E whose weight is 3 Kg more than D joins the group replacing A, then the average weight of B, C, D and E becomes 79 Kg. The weight of A is: