# Quiz Discussion

In a school with 600 students, the average age of the boys is 12 years and that of the girls is 11 years. If the average of the school is 11 years 9 months, then the average the number of girls in the school is :

Course Name: Quantitative Aptitude

• 1] 150
• 2] 250
• 3] 350
• 4] 450
##### Solution
No Solution Present Yet

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# Quiz
1
Discuss

The average age of P, Q and R is 15 years more than R's age. If the total age of P and Q together is 39 years, then R's age is ?

• 1] 12 years
• 2] 24 years
• 3] 16 years
• 4] 14 years
##### Solution
2
Discuss

The average (arithmetic mean) of 330, 360 and 390 is :

• 1]

$${3^{27}} + {3^{57}} + {3^{87}}$$

• 2]

$${3^{29}} + {3^{59}} + {3^{89}}$$

• 3]

$${3^{60}}$$

• 4]

$${3^{177}}$$

##### Solution
3
Discuss

The average of nine number is 50. The average of first five numbers is 54 and that of the last three numbers is 52. Then the sixth number is :

• 1] 30
• 2] 34
• 3] 24
• 4] 44
##### Solution
4
Discuss

In a primary school the average weight of male students is 65.9 kg and the average weight of female students is 57 kg. If the average weight of all the students ( both male and female ) is 60.3 kg and the number of male students in the school is 66, what is the number of female students in the school?

• 1] 162
• 2] 168
• 3] 180
• 4] 112
##### Solution
5
Discuss

Total expenses of a boarding house are partly fixed and partly varying linearly with the number of boarders. The average expense per boarder is Rs. 700 when there are 25 boarders and Rs. 600 when there are 50 boarders. What is the average expense per boarder when there are 100 boarders?

• 1] Rs. 540
• 2] Rs. 550
• 3] Rs. 570
• 4] Rs. 580
##### Solution
6
Discuss

The average annual income (in Rs.) of certain agricultural workers is S and that of other workers is T. The number of agricultural workers is 11 times that of other workers. Then the average monthly income (in Rs.) of all the workers is

• 1]

(S+T)/2

• 2]

(S+11T)/2

• 3]

(1/11S)+T

• 4]

(11S+T)/12

##### Solution
7
Discuss

If the average of x and 1/x(X$$\ne$$0) is M, then the average of x2 and 1/x2 is :

• 1] 1 - M2
• 2] 1 - 2M2
• 3] 2M2 - 1
• 4] 2M2 + 1
##### Solution
8
Discuss

The average of four consecutive even numbers is 15. The 2nd highest number is :

• 1] 12
• 2] 18
• 3] 14
• 4] 16
##### Solution
9
Discuss

The speed of the train going from Nagpur to Allahabad is 100 km/h while when coming back from Allahabad to Nagpur, its speed is 150 km/h. find the average speed during whole journey.

• 1] 125 km/hr
• 2] 75 km/hr
• 3] 135 km/hr
• 4] 120 km/hr
##### Solution
10
Discuss

There are two sections A and B of a class, consisting of 36 and 44 students' respectively. If the average weight of section A is 40kg and that of section B is 35kg, find the average weight of the whole class.

• 1] 30 kg
• 2] 35 kg
• 3] 42.5 kg
• 4] 37.25 kg
# Quiz