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.