Average Mcqs

Q.  The average weight of a group of boys is 30 kg. After a boy of weight 35 kg joins the group, the average weight of the group goes up by 1 kg. Find the number of boys in the group originally?

a. 4
b. 5
c. 6
d. 7


ANSWER: See Answer
 
Let the number off boys in the group originally be x.

Total weight of the boys = 30x
After the boy weighing 35 kg joins the group, total weight of boys = 30x + 35
So 30x + 35 + 31(x + 1) = > x = 4
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Category: Mathematics Quizzes,   Published by: T-Code Scripts
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Category: Mathematics Quizzes,   Published by: T-Code Scripts
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