**Average MCQ Questions Answer Quantitative Aptitude**

**1)The average age of 30 students is 9 yr. If the age of their teacher is included, it becomes 10 yr. the age of the teacher (in yr) is**

a)27

b) 31

c) 35

d) 40

[su_spoiler title=”View Answer” style=”fancy” icon=”arrow-circle-1″]Option – d)[/su_spoiler]

**2) The average of 50 numbers is 38. If two numbers, namely 45 and 55 are discarded, the average of remaining numbers is**

a) 36.5

b) 37

c) 37.5

d) 37.52

[su_spoiler title=”View Answer” style=”fancy” icon=”arrow-circle-1″]Option – c)[/su_spoiler]

**3) The average of 11 observations is 60. If the average of first five observations is 58 and that of the last five is 56, then the sixth observation is**

a) 90

b) 110

c) 85

d) 100

[su_spoiler title=”View Answer” style=”fancy” icon=”arrow-circle-1″]Option – a)[/su_spoiler]

**4) The average age of a class is 15.8 yr. the average age of the boys in the class is 16.4 yr while that of the girls is 15.4 yr. what is the ratio of boys to girls in the class?**

a) 1:2

b) 3:4

c) 3:5

d) None of these

[su_spoiler title=”View Answer” style=”fancy” icon=”arrow-circle-1″]Option – d)[/su_spoiler]

**5) Five years ago, the average age of P and Q was 15 yr. Average age of P,Q and R today is 20 yr. how old will R be after 10 yr ?**

a) 35 yr

b) 40 yr

c) 30 yr

d) 50 yr

[su_spoiler title=”View Answer” style=”fancy” icon=”arrow-circle-1″]Option – c)[/su_spoiler]

**6) The average weight of 9 mangoes increases by 20 g if one of them weighing 120g is replaced by another. The weight of new mango is**

a) 180 g

b) 200g

c) 260g

d) 300g

[su_spoiler title=”View Answer” style=”fancy” icon=”arrow-circle-1″]Option – d)[/su_spoiler]

**7) Five years ago, the average age of A,B,C and D was 45 yr. with E joining them now,the average of all the five is 49 yr. how old is E?**

a) 25 yr

b) 40 yr

c) 45 yr

d) 64 yr

[su_spoiler title=”View Answer” style=”fancy” icon=”arrow-circle-1″]Option – c)[/su_spoiler]

**8) The average of 5 numbers is 7. When 3 new numbers are added, the average of the eight numbers is 8.5. the average of three new numbers is**

a) 11

b) 7.75

c) 8.5

d) 7

[su_spoiler title=”View Answer” style=”fancy” icon=”arrow-circle-1″]Option – a)[/su_spoiler]

**9) A person covers half his journey by train at 60 km/h, half the remainder by bus at 30 km/h and the rest by cycle at 10 km/h. find his average speed during the entire journey**

a) 15 km/h

b) 24 km/h

c) 20 km/h

d) 33.3 km/h

[su_spoiler title=”View Answer” style=”fancy” icon=”arrow-circle-1″]Option – b)[/su_spoiler]

**10) A motorist travels to a place 150 km away at an average speed of 50 km/h and returns at 30 km/h. his average speed for the whole journey in km per h is**

a) 35

b) 37

c) 37.5

d) 40

[su_spoiler title=”View Answer” style=”fancy” icon=”arrow-circle-1″]Option – c)[/su_spoiler]

**11) In seven given numbers, the average of first four numbers is 4 and that of last four numbers is also 4. If the average of these seven numbers is 3, the fourth number is**

a) 3

b) 4

c) 7

d) 11

[su_spoiler title=”View Answer” style=”fancy” icon=”arrow-circle-1″]Option – d)[/su_spoiler]

**12) The average of 100 observations was calculated as 40. It was found later on that one of the observations was misread as 83 instead of 53. The correct average is**

a) 39

b) 39.7

c) 40.3

d) 42.7

[su_spoiler title=”View Answer” style=”fancy” icon=”arrow-circle-1″]Option – b)[/su_spoiler]

**13) A man spends Rs 1800 monthly on an average for the first four months and Rs 2000 monthly for the next eight months and saves Rs 5600 a year. His average monthly income is**

a) Rs 2000

b) Rs 2200

c) Rs 2400

d) Rs 2600

[su_spoiler title=”View Answer” style=”fancy” icon=”arrow-circle-1″]Option – c)[/su_spoiler]

**14) Three years ago, the average age of a family of 5 members was 17 yr. A baby having been born, the average age of the family is the same today. The present age of the baby is**

a) 2 yr

b) 2.4 yr

c) 3 yr

d) 1.5 yr

[su_spoiler title=”View Answer” style=”fancy” icon=”arrow-circle-1″]Option – a)[/su_spoiler]

**15) The average of marks of a student in 7 subjects is 75. His average in 6 subjects excluding science is 72. How many marks did he get in science ?**

a) 72

b) 90

c) 93

d) None of these

[su_spoiler title=”View Answer” style=”fancy” icon=”arrow-circle-1″]Option – c)[/su_spoiler]