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SBI SO Exam Quantitative Aptitude Study Material

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Heights & Distances

The average weight of 15 oarsmen in a boat is increased by 1.6 kg when one of the crew, who weighs 42 kg is replaced by a new man. Find the weight of the new man (in kg).

a) 65
b) 66
c) 43
d) 67

✔Answer

Correct Answer Is : 66

Solution Is :

The average of 7, 11, 15, x, 14, 21, 25 is 15, then the value of x is

a) 13.3
b) 12
c) 3
d) 14.5

✔Answer

Correct Answer Is : 12

Solution Is :

The average marks obtained by a student in 6 subjects is 88. On subsequent verification it was found that the marks obtained by him in a subject was wrongly copied as 86 instead of 68. The correct average of the marks obtained by him is

a) 85
b) 87
c) 84
d) 86

✔Answer

Correct Answer Is : 85

Solution Is :

What is the arithmetic mean of first 20 odd natural numbers?

a) 17
b) 19
c) 22
d) 20

✔Answer

Correct Answer Is : 20

Solution Is :

A kite is flying at the height of 75m from the ground. The string makes an angle θ (where cotθ = 8/15) with the level ground. Assuming that there is no slack in the string the length of the string is equal to :

a) 75m
b) 85m
c) 40m
d) 65m

✔Answer

Correct Answer Is : 85m

Solution Is :

If a person travels from a point L towards east for 12km and then travels 5 km towards north and reaches a point M, then shortest distance from L to M is:

a) 14
b) 12
c) 17
d) 13

✔Answer

Correct Answer Is : 13

Solution Is :

A librarian purchased 50 story-books for his library. But he saw that he could get14 more books by spending Rs. 76 more and the average price per book would be reduced by Re. 1. The average price (in Rs.) of each book he bought, was :

a) 5
b) 10
c) 25
d) 20

✔Answer

Correct Answer Is : 10

Solution Is :

Of three numbers, the first is twice the second and the second is thrice the third. If the average of the three numbers is 10, then the largest number is

a) 12
b) 18
c) 30
d) 15

✔Answer

Correct Answer Is : 18

Solution Is :

Out of 30 teachers of a school, a teacher of age 60 years retired. In his place another teacher of age 30 years was appointed. As a result, the mean age of the teachers will

a) Decrease by 2 years
b) Decrease by 6 months
c) Decrease by 1 year
d) Remain same

✔Answer

Correct Answer Is : Decrease by 1 year

Solution Is :

Average age of A, B and C is 84 years. When D joins them the average age becomes 80 years. A new person, E, whose age is 4 years more than D, replaces A and the average of B, C, D and E becomes 78 years. What is the age of A ?

a) 50 years
b) 60 years
c) 70 years
d) 80 years

✔Answer

SBI SO Exam Quantitative Aptitude Study Material

Heights & Distances

The average weight of 15 oarsmen in a boat is increased by 1.6 kg when one of the crew, who weighs 42 kg is replaced by a new man. Find the weight of the new man (in kg).

Correct Answer Is : 66

Solution Is :

The average of 7, 11, 15, x, 14, 21, 25 is 15, then the value of x is

Correct Answer Is : 12

Solution Is :

The average marks obtained by a student in 6 subjects is 88. On subsequent verification it was found that the marks obtained by him in a subject was wrongly copied as 86 instead of 68. The correct average of the marks obtained by him is

Correct Answer Is : 85

Solution Is :

What is the arithmetic mean of first 20 odd natural numbers?

Correct Answer Is : 20

Solution Is :

A kite is flying at the height of 75m from the ground. The string makes an angle θ (where cotθ = 8/15) with the level ground. Assuming that there is no slack in the string the length of the string is equal to :

Correct Answer Is : 85m

Solution Is :

If a person travels from a point L towards east for 12km and then travels 5 km towards north and reaches a point M, then shortest distance from L to M is:

Correct Answer Is : 13

Solution Is :

A librarian purchased 50 story-books for his library. But he saw that he could get14 more books by spending Rs. 76 more and the average price per book would be reduced by Re. 1. The average price (in Rs.) of each book he bought, was :

Correct Answer Is : 10

Solution Is :

Of three numbers, the first is twice the second and the second is thrice the third. If the average of the three numbers is 10, then the largest number is

Correct Answer Is : 18

Solution Is :

Out of 30 teachers of a school, a teacher of age 60 years retired. In his place another teacher of age 30 years was appointed. As a result, the mean age of the teachers will

Correct Answer Is : Decrease by 1 year

Solution Is :

Average age of A, B and C is 84 years. When D joins them the average age becomes 80 years. A new person, E, whose age is 4 years more than D, replaces A and the average of B, C, D and E becomes 78 years. What is the age of A ?

Correct Answer Is : 80 years

Solution Is :

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