Question
The average age of a class of 17 girls is 12 years. If 3
new girls having average age of 8 years join the class, then the average age of the class becomes:Solution
Total age of 17 girls = 17 × 12 = 204 years Total age of 20 girls = 204 + (3 × 8) = 228 years Therefore new average age = 228/20 = 11.4 years
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 a...
The average wage of a group of 25 labourers is Rs. 470. If 4 persons receiving average wage of Rs. 350 leave the group and 2 persons receiving average w...
- The incomes of ‘X’, ‘Y’, and ‘Z’ are in the ratio 5:6:9, respectively. The average income of the three is Rs. 15,000. If ‘X’, ‘Y’, and ...
Each question contains a statement followed by Quantity I and II. Read the information clearly and answer your questions accordingly.
Quanti...
- The average score of a batsman in a number of innings is 40. He scores 88 in the next inning, raising his average by 1.6. Find the total runs scored before...
In an examination, the average marks obtained by the students is 40. After correcting the quantitative mistakes, the average of 50 students is reduced t...
The average weight of 16 people increases by 500 grams when two individuals, each with an average weight of 40 kg, are added. What is the new average we...
The average speed of a vehicle for a certain number of hours is 48 km/hr. If the vehicle travels 120 km in the next hour, the average increases by 2 km/...
- There are three distinct numbers ‘x’, ‘y’ and ‘z’. If, x = 180, (x + y) = 480 and (z – y) = 60, then find the average of x, y and z.
The average age of A and B is 18 years. If A is to be replaced by C, the average would be 17 years. The average age of C and A is 19 years. Find the age...
Relevant for Exams:
