Aptitude and Reasoning Questions

Q:

A bag contains 2 red, 3 green and 2 blue balls. Two balls are drawn at random. What is the probability that none of the balls drawn is blue?

A) 10/21 B) 11/21
C) 1/2 D) 2/7
 
Answer & Explanation Answer: A) 10/21

Explanation:

Total number of balls = (2 + 3 + 2) = 7.

 

Let S be the sample space.

 

Then, n(S) = Number of ways of drawing 2 balls out of 7 =7C2 = 21

 

Let E = Event of drawing 2 balls, none of which is blue.

 

n(E) = Number of ways of drawing 2 balls out of (2 + 3) balls =5C2 = 10

 

Therefore, P(E) = n(E)/n(S) = 10/ 21.

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Filed Under: Probability

37 29063
Q:

In the following question, select the missing number from the given series.

470, 465, 460, 455, ?, 445

A) 450 B) 448
C) 440 D) 452
 
Answer & Explanation Answer: A) 450

Explanation:
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Filed Under: Number Series
Exam Prep: Bank Exams

1 29050
Q:

Find the volume (in cm3) of a hemisphere of diameter 14 cm.

 

 

A) 512.33 B) 718.67
C) 628 D) 825
 
Answer & Explanation Answer: B) 718.67

Explanation:
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Filed Under: Area
Exam Prep: Bank Exams

1 29015
Q:

If E = 5 and READ is coded as 7, then what is the code of 'DEAR' ?

A) 6 B) 7
C) 8 D) 9
 
Answer & Explanation Answer: B) 7

Explanation:

Here E = 5 = 5/1 = 5

=> READ = 18 + 5 + 1 + 4 = 28/4 = 7

=> DEAR = 4 + 5 + 1 + 18 = 28/4 = 7

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Filed Under: Coding and Decoding
Exam Prep: AIEEE , Bank Exams , CAT , GATE , GRE , TOEFL
Job Role: Bank Clerk , Bank PO

110 28997
Q:

The diameter of the driving wheel of a bus is 140 cm. How many revolution, per minute must the wheel make in order to keep a speed of 66 kmph ?

A) 150 B) 250
C) 350 D) 550
 
Answer & Explanation Answer: B) 250

Explanation:

Circumference = No.of revolutions * Distance covered

 

Distance to be covered in 1 min. = (66 X1000)/60 m = 1100 m.
Circumference of the wheel = 2 x (22/7) x 0.70 m = 4.4 m.
Number of revolutions per min. =(1100/4.4) = 250.

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Filed Under: Area
Exam Prep: Bank Exams
Job Role: Bank PO

47 28970
Q:

Find the missing number in the following series:

43, 172, 86, 344, ?

A) 172 B) 258
C) 129 D) 430
 
Answer & Explanation Answer: A) 172

Explanation:
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0 28960
Q:

The banker's discount on a bill due 6 months hence at 6% is Rs. 18.54. What is the true discount?

A) Rs. 24 B) Rs. 12
C) Rs. 36 D) Rs. 18
 
Answer & Explanation Answer: D) Rs. 18

Explanation:
T= 6 months = 1/2 year

R = 6%

TD= BD×100100+TR=18.54×100100+12×6=Rs.18
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Filed Under: Banker's Discount

3 28946
Q:

What is the pass percentage in at least one of the two exams for section A (approximately or rounded)?

 

A) 80 B) 65
C) 75 D) 70
 
Answer & Explanation Answer: C) 75

Explanation:
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Filed Under: Table Charts
Exam Prep: Bank Exams

0 28943