Exams Questions and Answers

Q:

5/9 of the part of the population in a village are females. If 30 % of the females are married. The percentage of unmarried males in the total males is ?

A) 62.5 %	B) 125 %
C) 84.32 %	D) 46.87 %

Answer & Explanation Answer: A) 62.5 %

Explanation:

Let total population = p
number of females = 5p/9
number of males =(p-5p/9) = 4p/9
married females = 30% of 5p/9 = 30x5p/100x9 = p/6
married males = p/6
unmarried males =(4p/9-p/6) = 5p/18
Percentage of unmarried males in the total males = {(5p/18)/4p/9}x100 = (5p/18)x(9/4p) = 125/2 % = 62.5%

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Filed Under: Percentage
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21 15478

Q:

Refer the below data table and answer the following question.

If the GDP of the country was $8 trillion at the end of 2011, what is it at the beginning of 2013?

A) $8.56 trillion	B) $7.44 trillion
C) $8.24 trillion	D) $8 trillion

Answer & Explanation Answer: A) $8.56 trillion

Explanation:

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1 15474

Q:

Find the total numbers greater than 4000 that can be formed with digits 2, 3, 4, 5, 6 no digit being repeated in any number ?

A) 120	B) 256
C) 192	D) 244

Answer & Explanation Answer: C) 192

Explanation:

We are having with digits 2, 3, 4, 5 & 6 and numbers greater than 4000 are to be formed, no digit is repeated.

The number can be 4 digited but greater than 4000 or 5 digited.

Number of 4 digited numbers greater than 4000 are
4 or 5 or 6 can occupy thousand place => 3 x ${}^{4}P_{3}$ = 3 x 24 = 72.

5 digited numbers = ${}^{5}P_{5}$ = 5! = 120

So the total numbers greater than 4000 = 72 + 120 = 192

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Filed Under: Permutations and Combinations
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21 15473

Q:

Refer the below data table and answer the following question.

Who has the least weight to height ratio?

A) Anju	B) Ankitha
C) Anupama	D) Anuradha

Answer & Explanation Answer: C) Anupama

Explanation:

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0 15466

Q:

8 couples (husband and wife) attend a dance show "Nach Baliye' in a popular TV channel ; A lucky draw in which 4 persons picked up for a prize is held, then the probability that there is atleast one couple will be selected is :

A) 8/39	B) 15/39
C) 12/13	D) None of these

Answer & Explanation Answer: B) 15/39

Explanation:

P( selecting atleast one couple) = 1 - P(selecting none of the couples for the prize)

= $1 - (\frac{16_{C_{1}} \times 14_{C_{1}} \times 12_{C_{1}} \times 10_{C_{1}}}{16_{C_{4}}}) = \frac{15}{39}$

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Filed Under: Probability
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64 15455

Q:

A man walking at the speed of 4 kmph crosses a square field diagonally in 3 meters.The area of the field is

A) 10000	B) 20000
C) 30000	D) 40000

Answer & Explanation Answer: B) 20000

Explanation:

speed of the man = 4 x (5/18) m/sec = 10/9 m/sec

time taken = 3 x 60 sec = 180 sec

length of diagonal = speed x time = (10/9) x 180 = 200m

Area of the field = (1/2) x (dioagonal)²

= (1/2) x 200 x 200 sq.m = 20000sq.m

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Filed Under: Area
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6 15455

Q:

Refer the below data table and answer the following question.

What is the ratio of boys to girls ?

A) 33 : 28	B) 33 : 34
C) 34 : 33	D) 28 : 33

Answer & Explanation Answer: D) 28 : 33

Explanation:

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Q:

Statements followed by some conclusions are given below.

Statements :

1. Demand and supply determine the prices of goods and services.

2. When there are too many buyers, prices are pushed up and too many sellers push down prices.

Conclusions :

I. Buyers and sellers determine the prices.

II. Price discovery is market driven.

Find which of the given conclusions logically follows from the given statements.

A) Only conclusion I follows	B) Only conclusion II follows
C) Both I and II follow	D) Neither I nor II follows

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