Average Mixture & Alligation Level-1 Quiz-3

1. The current average age of a family of four members A, B, C and D is 15 years. Find the average age (in years) of the family after 5 years.

2. The average sales of Saraswati Motors from January to June are 150 units. Its average sales from July to October are 240 units. What is the average sales (in units) for the months November and December if the average sales for the year are 200 units?

3. Three numbers have an average of 20. If two of the numbers are 14 and 28, the third number is?

4. The average age of a class of 20 students is 20 years. If a new student, whose age is 20 years, joins the class, find the new average age of the class. (in years)

5. A student scored an average of 80 marks in 3 subjects: Physics, Chemistry and Mathematics. If his average marks in Physics and Mathematics is 90 and that in Physics and Chemistry is 70, what is the marks in Physics?

6. A vessel contains 20 liters of a mixture of milk and water containing 60% milk. 5 liters of pure milk is added to it. Find the percentage of milk in the new mixture.

7. In a group there were 19 boys. One boy named Bhavan ate 18 chocolates more than the average number of chocolates eaten by all the boys. If the remaining 18 boys ate an average of 5 chocolates, find the number of chocolates eaten by Bhavan.

8. A vessel contains 70 litres of a mixture of milk and water containing 90% milk. Find the quantity (in liters) of water to be added to the vessel so that the percentage of milk in the new solution is 87.5%

9. A group consists of 11 men. If two men whose ages are 29 and 31 years are replaced by two other men named Amar and Bhavan, the average age of the group drops by one year. The average age of Amar and Bhavan (in years) is?

10. In an office, the average height of female employees is 150 cm and the average height of male employees is 160 cm. If there are 300 employees in the office, find the average height (in cm) of all the employees.