A speaks the, truth 3 out of 4 times, and B 5 put of 6 times. What is the probability that they will contradict each other in stating the same fact

1.  2/3  

2.  1/3

3.  5/6

4.  1/2  

5.  None of these.

View Answer  
5
Correct Answer :

1/3


Explanation :
No Explanation available for this question

A party of V persons sit at a round table. Find the odds against two specified persons sitting next to each other.

1.  n + 1/2  

2.  n – 3/2

3.  n + 3/2

4.  n + 2/3.  

5.  None of these.

View Answer  
5
Correct Answer :

n – 3/2


Explanation :
No Explanation available for this question

If 4 whole numbers are taken at random arid multiplied together, what is the chance that the last digit in the product is 1, 3, 7 or 9

1.  15/653  

2.  12/542

3.  16/625

4.  13/625  

5.  17/625.

View Answer  
5
Correct Answer :

16/625


Explanation :
No Explanation available for this question

In four throws with a pair of dices, what is the chance of throwing a double twice

1.  11/216  

2.  25/216

3.  35/216

4.  45/216  

5.  41/216.

View Answer  
5
Correct Answer :

25/216


Explanation :
No Explanation available for this question

A life insurance company insured 25,000 young boys, 14,000 young girls and 16,000 young adults. The probability of death within 10 years of a young boy, young girl and a young adult are 0.02, 0.03 and 0.15 respectively. One of the insured persons dices. What is the probability that the dead person is a young boy

1.  36/165  

2.  25/166

3.  26/165

4.  30/165  

5.  32/165.

View Answer  
5
Correct Answer :

25/166


Explanation :
No Explanation available for this question

Three groups of children contain 3 girls and 1 boy, 2 girls and 2 boys, and 1 girl and 2 boys respectively. One child is selected at random from each group. The prob­ability that the three selected consist of 1 girl and 2 boys is

1.  3/8  

2.  1/5

3.  5/8

4.  2/3  

5.  3/5

View Answer  
5
Correct Answer :

3/8

 


Explanation :
No Explanation available for this question

A locker at the world famous WTC building can be opened by dialing a fixed three-digit code (between 000 and 999). Don, a terrorist, only knows that the number is a three-digit number and has only one six. Using this information he tries to open the locker by dialing three digits at random. The probability that he succeeds in his endeavor is

1.  1/243  

2.  1/900

3.  1/1000

4.  1/216  

5.  3/216.

View Answer  
5
Correct Answer :

1/243

 


Explanation :
No Explanation available for this question

In a bag there are 12 black and 6 white balls. Two balls are chosen at random and the first one is found to be black. The probability that the second one is also black is:

1.  11/17  

2.  12/17

3.  13/18

4.  5/17  

5.  None of these.

View Answer  
5
Correct Answer :

11/17

 


Explanation :
No Explanation available for this question

In the above question, what is the probability that the second one is white

1.  3/17  

2.  6/17

3.  5/17  

4.  1/17.

View Answer  
4
Correct Answer :

6/17


Explanation :
No Explanation available for this question

A fair dice is tossed six times. Find the probability of getting a third six on the sixth throw.

1.  5C252/62  

2.  5C253/66

3.  5C352/63  

4.  5C352/66.

View Answer  
4
Correct Answer :

5C253/66


Explanation :
No Explanation available for this question
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