Aptitude and Reasoning Questions

Q:

If a box contains 10 bulbs,of which just three are defective. If a random sample of five bulbs is drawn, find the probability that the sample contains no defective bulbs.

A) 5/12 B) 7/12
C) 3/14 D) 1/12
 
Answer & Explanation Answer: D) 1/12

Explanation:

Total number of elementary events = 10C5

 

Number of ways of selecting no defective bulbs i.e., 5 non-defective bulbs out of 7 is 7C5.

 

So,required probability =7C510C5 = 1/12.

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Filed Under: Probability

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Q:

A women goes to market with Rs.500 to buy oranges.the prices of the oranges have decreased by 10% so he could buy 2kg more with the amount she had.What was the original price of the oranges ?

A) 22.77 B) 25.77
C) 27.77 D) 29.77
 
Answer & Explanation Answer: C) 27.77

Explanation:

If the price of the oranges decreases by 10%, the woman would save 10% of the money that is Rs.50 to buy the same amount as before.Now in Rs. 50 she can buy 2 kg more, therefore the current price of 1 kg of oranges is Rs25.Now, this current price is after 10% reduction.

 

 

 

Therefore, the original price =  25/0.9  = Rs. 27.77

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Filed Under: Profit and Loss
Exam Prep: CAT , Bank Exams
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37 13375
Q:

In a certain code language Infinite means Size. What is the meaning of  Indefinite in that code language? 

A) Time B) Day
C) Meaning D) Shape
 
Answer & Explanation Answer: A) Time

Explanation:

Something that is infinite is extremely large in amount or degree and if something is indefinite it has not been decided when it will stop  or finish.

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Filed Under: Analogy

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Q:

The primitive atmosphere was reducing because:

 

A) Hydrogen atoms were few B) Hydrogen atoms were active and in greater numbers
C) Oxygen atoms were more D) Nitrogen atoms were more
 
Answer & Explanation Answer: B) Hydrogen atoms were active and in greater numbers

Explanation:
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Q:

Water flows into a tank 200 m x 160 m through a rectangular pipe of 1.5m x 1.25 m @ 20 kmph . In what time (in minutes) will the water rise by 2 meters?

A) 92min B) 93min
C) 95min D) 96min
 
Answer & Explanation Answer: D) 96min

Explanation:

Volume required in the tank = (200 x 150 x 2) cu.m = 60000 cu.m 

Length of water column flown in1 min =(20 x 1000)/60 m =1000/3 m 

Volume flown per minute = 1.5 x 1.25 x (1000/3) cu.m= 625 cu.m. 

Required time = (60000/625)min = 96min

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12 13327
Q:

When Ram was born, his father was 32 years older than his brother and his mother was 25 years older than his sister. If Ram's brother is 6 years older than Ram and his mother is 3 years younger than his father, how old was Ram's sister when Ram was born ?

A) 6 years B) 8 years
C) 10 years D) 12 years
 
Answer & Explanation Answer: C) 10 years

Explanation:

Ram age when he was born = 0 years
=> His brother's age = 6 year
=> His father's age = brother age + 32years = 6+32 = 38
=> His mother's age = father's age - 3 = 35
So sister's age = 35-25 = 10years.

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Filed Under: Problems on Ages
Exam Prep: AIEEE , Bank Exams , CAT
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Q:

Showing a man a woman said, "His brother's father is the only son of my grandfather". How is the woman related to the man? 

A) Sister B) Aunt
C) Sister-in-law D) Daughter-in-law
 
Answer & Explanation Answer: A) Sister

Explanation:

The man's brother's father means his father is the only son of woman's grandfather

=> grandfather to the man also

=> Woman and the man are brother and sisters.

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Filed Under: Blood Relations
Exam Prep: AIEEE , Bank Exams , CAT
Job Role: Bank Clerk , Bank PO

55 13320
Q:

The effective annual rate of interest corresponding to a nominal rate of 6% per annum payable half-yearly is

A) 6.06% B) 6.07%
C) 6.08% D) 6.09%
 
Answer & Explanation Answer: D) 6.09%

Explanation:

Amount of Rs. 100 for 1 year

when compounded half-yearly = Rs.[100*(1+3/100)^2]=Rs.106.09

Effective rate=(106.09-100)%=6.09%

 

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Filed Under: Compound Interest
Exam Prep: Bank Exams
Job Role: Bank PO

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