The average weight of 5 students decreases by 12 kg when one of them weighing 72 kg is replaced by a new student. The weight of the student is Choose the correct choice from the following:
A) 12 kg B) 10 kg C) 20 kg D) 72 kg E) None of these
Explanation :   Let the weight of student be x kg.   Given, Difference in average weight = 12 kg   =&gt; (72-x)/5 = 12   =&gt; x = 12   12 kgnswer : 12 kg
<result>A</result>
The average weight of 5 students decreases by 12 kg when one of them weighing 72 kg is replaced by a new student. The weight of the student is