# Quiz Discussion

The average of 6 observations is 45.5. If one new observation is added to the previous observations, then the new average becomes 47. The new observation is :

Course Name: Quantitative Aptitude

• 1] 58
• 2] 56
• 3] 50
• 4] 46
##### Solution
No Solution Present Yet

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# Quiz
1
Discuss

The average monthly income of P and Q is Rs. 6000; that of Q and R is Rs. 5250; and that P and R is Rs. 5500. What is P’s monthly income?

• 1] Rs. 3500
• 2] Rs. 4500
• 3] Rs. 6250
• 4] Rs. 4800
##### Solution
2
Discuss

The average of x number is y and average of y numbers is x. Then the average of all the numbers taken together is

• 1]

(x+y)/2xy

• 2]

2xy/(x+y)

• 3]

(x2+y2)/(x+y)

• 4]

xy/(x+y)

##### Solution
3
Discuss

The average age of a family of 10 members is 20 years. If the age of the youngest member of the family is 10 years, then the average age of the members of the family just before the birth of the youngest member was approximately.

• 1]

27.14 years

• 2]

12.5 years

• 3]

14.28 years

• 4]

$$11\frac{1}{9}$$ years

##### Solution
4
Discuss

The average monthly salary of 12 workers and 3 managers in a factory was Rs. 600. When one of the manager whose salary was Rs. 720, was replaced with a new manager, then the average salary of the team went down to 580. What is the salary of the new manager?

• 1] 640
• 2] 690
• 3] 420
• 4] 570
##### Solution
5
Discuss

Out of 9 persons, 8 persons spent Rs. 30 on each of their meals. The ninth one spends Rs. 20 more than the average expenditure of all the nine. The total money spent by all of them was

• 1]

Rs 260

• 2]

Rs 290

• 3]

Rs 292.5

• 4]

Rs 400.5

##### Solution
6
Discuss

The average age of husband, wife and their child 3 years ago was 27 years and that of wife and the child 5 years ago was 20 years. The present age of the husband is :

• 1] 40 years
• 2] 35 years
• 3] 50 years
• 4] None of the options
##### Solution
7
Discuss

In an exam, the average marks obtained by Jhon in English, Math, Hindi and Drawing were 50. His average mark in Maths, Science, Social Studies and Craft were 70. If the average mark in all seven subjects is 58, his score in Maths was -

• 1] 50
• 2] 52
• 3] 60
• 4] 74
##### Solution
8
Discuss

The reduction in the speed of an engine is directly proportional to the square of the number of bogies attached to it. The speed of the train is 100 km/hr when there are 4 bogies and 55 kmph when there are 5 bogies. What is the maximum number of bogies that can be attached to the train so that it can move?

• 1]

4

• 2]

5

• 3]

6

• 4]

7

##### Solution
9
Discuss

The present age of a father is 3 years more than three times the age of his son. Three years hence, father's age will be 10 years more than twice the age of the son. The father's age is :

• 1] 33 years
• 2] 39 years
• 3] 45 years
• 4] 40 years
##### Solution
10
Discuss

The average of runs scored by a cricketer in his 99 innings is 99. How many runs will he have to score to his 100th innings so that his average of runs in 100 innings will become 100 ?

• 1] 100
• 2] 99
• 3] 199
• 4] 101
# Quiz