A letter is known to have come from TATANAGAR or CALCUTTA. On the envelope just two consecutive letters TA are visible. The probability that the letter has come from CALCUTTA is

1.  4/11

2.  7/11

3.  1/22

4.  21/22

View Answer  
4
Correct Answer :

4/11


Explanation :
No Explanation available for this question

In five cards are drawn at random from a pack of cards, the probability that they belong to different denominations is:

1.  3223/4165

2.  2332/4165

3.  2112/4165

4.  1221/4165

View Answer  
4
Correct Answer :

2112/4165


Explanation :
No Explanation available for this question

Six boys and six girls are to sit around a round table. The probability that boys and girls sit alternately is:

1.  ∠5∠5/∠11

2.  ∠5∠6/∠11

3.  ∠6∠6/∠12

4.  ∠5∠6/∠12

View Answer  
4
Correct Answer :

∠5∠6/∠11


Explanation :
No Explanation available for this question

Assuming that a year consists of 365 days. The probability that a group of 30 people have all different birthdays is

1.  365/36530

2.  30/36530

3.  365P30/36530

4.  364/36530

View Answer  
4
Correct Answer :

365P30/36530


Explanation :
No Explanation available for this question

A random variable X takes the values 0, 1, and 2. If (X=1)=P(X=2) and P(X=0)=0.4, then the mean value of the random variable X is:

1.  0.2

2.  0.5

3.  0.7

4.  0.9

View Answer  
4
Correct Answer :

0.9


Explanation :
No Explanation available for this question

The value of C for which P(X=k)=CK2 can be probability mass function of a random variable x that takes values 0,1,2,3,4 is:

1.  1/30

2.  1/10

3.  1/3

4.  1/15

View Answer  
4
Correct Answer :

1/30


Explanation :
No Explanation available for this question

From a lot of 10 items containing 3 defectives, a sample of 4 items is drawn at random without replacement. The expected number of defective items is:

1.  3

2.  1.8

3.  1.2

4.  2.8

View Answer  
4
Correct Answer :

1.2


Explanation :
No Explanation available for this question

If a random variable X has the following probability distribution. X=xi

1.  33/16

2.  31/16

3.  35/16

4.  29/16

View Answer  
4
Correct Answer :

31/16


Explanation :
No Explanation available for this question

A random variable X has the probability distribution (X=x)

1.  I only

2.  II only

3.  both I and II

4.  neither I nor II

View Answer  
4
Correct Answer :

both I and II


Explanation :
No Explanation available for this question

If the probability distribution of a random variable X is X=xi

1.  0.6

2.  0.8

3.  1.0

4.  0.3

View Answer  
4
Correct Answer :

0.8


Explanation :
No Explanation available for this question
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