Six blue balls are put in three boxes. The probability of putting balls in the boxes in equal numbers is

1.  1/21  

2.  1/8

3.  1/28

4.  1/6  

5.  1/7.

View Answer  
5
Correct Answer :

1/28


Explanation :
No Explanation available for this question

AMS employs 8 professors on their staff. Their respec­tive probability of remaining in employment for 10 years are 0.2,0.3,0.4,0.5,0.6,0.7,0.8,0.9. The probability that after 10 years at least 6 of them still work in AMS is

1.  0.19  

2.  1.22

3.   0.1

4.   0.16  

5.   None of these.

View Answer  
5
Correct Answer :

0.19

 


Explanation :
No Explanation available for this question

A person draws a card from a pack of 52, replaces it and shuffles it. He continues doing so until he draws a heart. What is the probability that he has to make at least 3 trials

1.  3/17  

2.  8/19

3.  2/17

4.  9/16  

5.  11/16.

View Answer  
5
Correct Answer :

9/16

 


Explanation :
No Explanation available for this question

Hilips, the largest white goods producer in India, uses a quality check scheme on produced items before they are sent into the market. The plan is as follows: A set of 20 articles is readied and 4 of them are chosen at random. If any one of them is found to be defective then the whole set is put under 100% screening again. If no defectives are found, the whole set is sent into the market. Find the probability that a box containing 4 defective articles will be sent into the market

1.  364/969  

2.  364/963

3.  96/969

4.  346/969  

5.  343/969.

View Answer  
5
Correct Answer :

364/969

 


Explanation :
No Explanation available for this question

In the above question, what is the probability that a box containing only one defective will be sent back for screening

1.  2/3  

2.  1/5

3.  2/5

4.  3/5  

5.  4/5.

View Answer  
5
Correct Answer :

1/5


Explanation :
No Explanation available for this question

If the integers m and n are chosen at random from I to 100, then the probability that a number of the form 7m + 7n is divisible by 5 is

1.  1/4  

2.  1/2

3.  1/16

4.  1/8  

5.  1/6.

View Answer  
5
Correct Answer :

1/4

 


Explanation :
No Explanation available for this question

Three numbers are chosen at random without replace­ment from (1,2,3 ..., 10). The probability that the mini­mum number is 3 or the maximum number is 7 is

1.  12/37  

2.  11/40

3.  13/35

4.  12/34  

5.  14/35.

View Answer  
5
Correct Answer :

11/40


Explanation :
No Explanation available for this question

An unbiased dice with face values 1, 2,3, 4,5 and 6 is rolled four times. Out of the 4 face values obtained, find the probability that the minimum face value is not less than 2 and the maximum face value is not greater than 5.

1.  16/81

2.  14/64

3.  16/80

4.  15/47  

5.   None of these.

View Answer  
5
Correct Answer :

16/81


Explanation :
No Explanation available for this question

Three faces of a dice are yellow, two faces are red and one face is blue. The dice is tossed three times: Find the probability that the colours yellow, red and blue appear in the first, second and the third toss respectively.

1.  1/18

2.  1/12

3.  1/9

4.  1/36

View Answer  
4
Correct Answer :

1/36


Explanation :
No Explanation available for this question

If if6m each of three boxes containing 3 white and 1 black, 2 white and 2 black, 1 white and 3 black balls, one i ball is drawn at random then the probability that 2 white and 1 black ball will be drawn is

1.  13/32

2.  12/14

3.  12/25

4.  3/13.

View Answer  
4
Correct Answer :

13/32


Explanation :
No Explanation available for this question
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