The average weight of 30 students in a class increases by 0.5 kg when the weight of the principal is included. If earlier the average weight of the students was 50 kg, then find the weight of the principal.
ATQ, Total weight of the students (Excluding the weight of the principal) = 30 × 50 = 1500 kg New total weight of the students = 31 × (50 + 0.5) = 31 × 50.5 = 1565.5 kg So, weight of the principal = 1565.5 - 1500 = 65.5 kg
Average weight of 15 nurses is 50 kg. If the weight of one more nurse is included, then average weight is increased by 1 kg. Find the weight of the newl...
The average weight of 4 persons is 38 kg. The heaviest person’s weight is 22 kg more than the lightest person’s weight. If the average weight of the...
There are two sections A and B of a class, consisting of 38 and 42 students, respectively. If the average weight of the students of section A is 55 kg ...
Find the average of the following set scores. 450, 1050, 12, 390, 143, 286, 550, 999
The average weight of 4 persons is 66 kg. The heaviest person’s weight is 32 kg more than the lightest person’s weight. If the average weight of the...
In an Aerobic class, the average age of all the members was 54.5 years, 11 members left the class and 7 new members joined. If the average age increase...
The average expenditure of a man for the first 4 month is Rs.4000 and for the next 8 months is Rs.6000. If he saves 11000 in that year then find his ave...
The average salary of 36 employees ( Teachers+principals) in a School is Rs.10,375. A Principal in the School receives a salary that is 125% higher than...
Average run scored by a batsman in first ‘x’ matches is 75. In next 13 matches he scored runs with an average of 90 so that his overa...
The average age of a group of 70 students is 13 years. If 3 students whose ages are 15 years, 21 years, and _____ years are replaced by 3 new students w...
