# Quiz Discussion

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

Course Name: Quantitative Aptitude

• 1]

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

• 2]

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

• 3]

$${3^{60}}$$

• 4]

$${3^{177}}$$

##### Solution
No Solution Present Yet

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# Quiz
1
Discuss

If the mean of 4 observations is 20, when a constant 'c' is added to each observation, the mean becomes 22. The value of c is :

• 1]

6

• 2]

-2

• 3]

2

• 4]

4

##### Solution
2
Discuss

The average of the first five multiples of 9 is:

• 1] 20
• 2] 27
• 3] 28
• 4] 30
##### Solution
3
Discuss

The average of six numbers is x and the average of three of these is y. If the average of the remaining three is z, then-

• 1] x = y + z
• 2] 2x = y + z
• 3] x = 2y + 2z
• 4] None of these
##### Solution
4
Discuss

Average of a, b, and c is 11; average of c, d and e is 17; average of e and f is 22 and average of e and c is 17. Find out the average of a, b, c, d, e and f.

• 1]

$$15\frac{2}{3}$$

• 2]

$$18\frac{1}{2}$$

• 3]

$$16\frac{1}{2}$$

• 4]

None of these

##### Solution
5
Discuss

The average age of husband and his wife was 23 years at the time of their marriage. After five tears they have a one-year old child. The average age of the family of three, when the child was born, was-

• 1] 23 years
• 2] 24 years
• 3] 18 years
• 4] 20 years
##### Solution
6
Discuss

The average marks obtained by a class of 60 students is 65. The average marks of half of the students is found to be 85. The average marks of the remaining students is :

• 1] 35
• 2] 45
• 3] 55
• 4] 65
##### Solution
7
Discuss

A man travels equal distances of his journey at 40, 30 and 15 km/h. respectively. Find his average speed for whole journey.

• 1] 24
• 2] 25
• 3] 27
• 4] 28
##### Solution
8
Discuss

The average weight of 10 oarsmen in a boat is increased by 1.5kg when one of the crew who weighs 58kg is replaced by a new man.

• 1]

73 Kg

• 2]

64 Kg

• 3]

12 Kg

• 4]

34 Kg

##### Solution
9
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
##### Solution
10
Discuss

Four years ago, the average age of a family of four persons was 18 years. During this period, a baby was born. Today if the average age of the family is still 18 years, the age of the baby is

• 1] 1.2 years
• 2] 2 years
• 3] 2.5 years
• 4] 3 years
# Quiz