The average weight of 20 persons sitting in a boat had some value. A new person added to them whose weight was 48 kg only. Due to his arrival, the average weight of all the persons decreased by 5 kg. Find the average weight of first 20 persons?	Select the correct option
A) 55	B) 56	C) 57	D) 58	E) 59
20x + 48 = 21(x – 5)   X=57   ANSWER:57
<result>C</result>
The average weight of 20 persons sitting in a boat had some value. A new person added to them whose weight was 48 kg only. Due to his arrival, the average weight of all the persons decreased by 5 kg. Find the average weight of first 20 persons?