*Questions With Solution*

**1. **The average age of** 30 **students of a class is** 14 **years**, **if the age of a teacher is included, then the average age beocmes** 15 **years. What is the age of the teacher**?**

**a. 30 b. 45 c. 60 d. 25**

Solution :-

**2. **The average weight of four persons increase by** 3 **kg when a new person is replaced by one of them whose weight is** 120**. What is the weight of the new person**?**

**a. 132 b. 135 c. 140 d. 133**

Solution :-

**3. **The average age of three boys is** 15 **years. If their age ratio is **3:5:7, **what will be the age of the youngest boy?

**a. 6 b. 9 c. 3 d. 12**

Solution :-

**4. **A person covers a certain distance** X **km**/**hr. If he cover the same distance at a speed of **Y **km**/**hr. What will be his average speed**?**

Solution :-

**5. **The average marks of** 40 **students in a class is **86, **if the** 5 **heighest marks are removed, then the average is reduced by one unit, what is the average marks of the top** 5 **students**?**

**a. 90 b. 93 c. 95 d. 97**

Solution :-

**6. **The average run rate of** 6 **players in a cricket match was** 36. **If one of these players scored** 16, **then what is the average run of the remaining players**?**

**a. 37 b. 39 c. 40 d. 42**

Solution :-

**7. **A cricket player had an average of** 10 **innings, he scored** 108 **runs in the **11**th innings and this increased his average run by** 6. **Now what is his average run**?**

**a. 42 b. 44 c. 46 d. 48**

Solution :-

**8. **The average age of** 30 **students in a class is** 14 **years. If the age of a teacher is included, then the average age becomes **15 **years. What is the age of the teacher**?**

**a. 42 b. 44 c. 46 d. 45**

Solution :-

**9. **The average of two numbers **A **and** B **is** 20, **the average age of **B **and** C **is** 19 **and the average age of** C **and** A **is** 21. **What is the value of **A** **?**

**a. 20 b. 21 c. 22 d. 23**

Solution :-

**10. **The average marks of students is** 68 **in a class**. **The average marks of girls in the class is **80 **and the average marks of boys is **60. **What percentage of students are boys in the class**?**

**a. 55 b. 50 c. 60 d. 65**

Solution :-

**11. **The average marks of boys and girls in an examination is** 71 **and** 73 **respectively**. **The average marks of all students is **71.8. **What is the ratio of boys and girls**?**

**a. 3:2 b. 5:2 c. 4:5 d. 3:5**

Solution :-

**12. **The average of **5 **numbers is** 306.04. **The average of the first two numbers is** 431 **and the average of the last two numbers is** 214.5. **What is the third number**?**

**a. 33 b. 45 c. 75 d. ** None of these

Solution :-

**13. **The average marks of** 28 **students in mathematics was** 50. 8 **students left school, in that case the marks of remaining students increased by **5. **What is the average marks of students leaving the school**?**

**a. 35.5 b. 37.5 c. 39.5 d. 41.5**

Solution :-

**14. **The average marks of **120 **students was** 35. **If the average marks of passed students is **39 **and the average marks of failed students is **15, **then how many students passed**?**

**a. 90 b. 95 c. 100 d. 105**

Solution :-

**15. **The average of **13** numbers is** 68. **The average of the first** 7 **numbers of them is** 63 **and the average of last **7 **numbers is** 70. **What is the seventh number**?**

**a. 45 b. 47 c. 49 d. 51**

Solution :-