The average weight of a class of 24 students is 35 kg. if the weight of the teacher be included, the average rises by 400 g. the weight of the teacher is
Choices:
A) 45 kg
B) 50 kg
C) 53 kg
D) 55 kg
E) None of these
Solution   Weight of the teacher = (35.4 × 25 - 35 × 24) kg = 45 kg. 45 kgnswer 45 kg
<result>A</result>
The average weight of a class of 24 students is 35 kg. if the weight of the teacher be included, the average rises by 400 g. the weight of the teacher is