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Aptitude Day 175

Answers of Day 174 : 
1.       72.
2.       2180.


Problems on Average:

1. The average weight of a class of 15 students is 40 kg. If the weight of the teacher is included, the average rises by 500 g. The weight of the teacher is:

Solution:
                 The weight of the teacher = Sum of the weight of 15 students including the teacher – Sum of the weight of 15 students = (40.5*16) – (40*15) = 648-600 = 48 kg.


2. The captain of a cricket team of 11 members is 30 years old and the wicketkeeper is 5 years younger. If the ages of these 2 are excluded, the average age of the remaining players is one year less than the average age of the whole team. What’s the average age of the team?

Solution:
                Let the average of the team be x. 
                11x- (30+25) = 9(x-1)
                11x-55 = 9x-18
                2x = 46
                x = 23.


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