Two numbers are selected from the set of numbers {3,6,9, 12, 15,.......99} at random. Find the probability that the sum of the two numbers selected is odd

1.  1/11

2.  17/33

3.  7/33

4.  2/11

View Answer  
4
Correct Answer :

17/33



Explanation :
No Explanation available for this question

A bag contains 8 red and 4 blue balls and another bag contains 7 blue and 5 red balls. If one of the bags is selected at random and two balls are drawn at random from the bag thus selected, the probability that the two balls are of different colours is

1.  9/144

2.  135/144

3.  67/132

4.  65/132

View Answer  
4
Correct Answer :

67/132


Explanation :
No Explanation available for this question

In a class, there are equal number of boys and girls.Two students are selected for a game. If the probability that two students are girls is 7/29, then find the strength of the class  

1.   15

2.  30

3.  90

4.  60

View Answer  
4
Correct Answer :

30


Explanation :
No Explanation available for this question

Three balls are drawn at random, from an urn containing 5 yellow, 4 white and 3 blue balls, what is the probability that the three balls are of the same colour

1.  17/30

2.  13/30

3.  3/44

4.  3/11

View Answer  
4
Correct Answer :

3/44


Explanation :
No Explanation available for this question

In a school there are 6 teachers, 10 boys and 4 girls. A team of 3 members is to be formed from these persons.Find the probability that the team contains 1 teacher, 1 boy and 1 girl.

1.  4/19

2.  15/19

3.  1/57

4.  56/57

View Answer  
4
Correct Answer :

4/19


Explanation :
No Explanation available for this question

A and B pick up a card at random .from a well shuffled pack of cards, one after the other, replacing it every time till one of them gets a heart. If A begins the game,then the probability that the game ends with B is

1.  3/7

2.  4/7

3.  3/4

4.  1/4

View Answer  
4
Correct Answer :

3/7


Explanation :
No Explanation available for this question

If the probability for X and Y to pass in an examination is 0.9 and 0.8 respectively, then find the probability that either X or Y fails.

1.  0.98

2.  0.28

3.  0.72

4.  0.02

View Answer  
4
Correct Answer :

0.28



Explanation :
No Explanation available for this question

Three mountaineers Arvind, Jayesh and Mohit are climbing up a mountain with their respective probabilities of reaching the summit being 1/3, 1/5 and 1/4 respectively. What is the probability that exactly one of them reaches the summit

1.  13/30

2.  17/30

3.  19/30

4.  11/30

View Answer  
4
Correct Answer :

13/30


Explanation :
No Explanation available for this question

What is the probability of getting exactly 53 Mondays in a leap year

1.  2/7

2.  1/7

3.  6/7

4.  5/7

View Answer  
4
Correct Answer :

2/7


Explanation :
No Explanation available for this question

Six unbiased coins are tossed together. The probability that the number of heads exceeds the number of tails is

1.  21/64

2.  11/32

3.  1/6

4.  5/16

View Answer  
4
Correct Answer :

11/32



Explanation :
No Explanation available for this question
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