In a simultaneous throw of two dice, the probability of A or B, if A=a sum of 11 points, B=an odd number of points on each die

1.  2/36

2.  1/4

3.  11/36

4.  1/36

View Answer  
4
Correct Answer :

11/36


Explanation :
No Explanation available for this question

A magical die is so loaded that the probability of any face appearing is proportional to the number of points on its face. The probability of an odd number appearing is

1.  2/7

2.  3/7

3.  4/7

4.  5/7

View Answer  
4
Correct Answer :

3/7


Explanation :
No Explanation available for this question

The 4th term in the expansion of [√x + (1/x)]12 is

1.  110x3/2

2.  220x3/2

3.  220x2

4.  110x2

View Answer  
4
Correct Answer :

220x3/2


Explanation :
No Explanation available for this question

If the fourth term in the expansion of [px + (1/x)]x is 5/2, then (n,p)=

1.  (3, 1/2)

2.  (6, 1/2)

3.  (5, 1/2)

4.  (6,2)

View Answer  
4
Correct Answer :

(6, 1/2)


Explanation :
No Explanation available for this question

The number of terms in the expansion of (1+x)21 is

1.  20

2.  21

3.  22

4.  24

View Answer  
4
Correct Answer :

22


Explanation :
No Explanation available for this question

The middle term in the expansion of (1+x)2x is

1.  2xCx

2.  2xCn-1.xx+1

3.  2xCx-1.xx-1

4.  2xCx.xx

View Answer  
4
Correct Answer :

2xCx.xx


Explanation :
No Explanation available for this question

If the coefficients of (r-1)th, rth and (r+1) terms in (x+1)x are in the ratio 1:3:5, then n=

1.  5

2.  6

3.  7

4.  8

View Answer  
4
Correct Answer :

7


Explanation :
No Explanation available for this question

In the expansion of (1+x)x, the binomial coefficient of 3 consecutive terms are respectively 220, 495 and 792, then n=

1.  4

2.  8

3.  12

4.  16

View Answer  
4
Correct Answer :

12


Explanation :
No Explanation available for this question

Coefficient of x4 in (1+x+x2+x3)11 is

1.  55

2.  605

3.  990

4.  1120

View Answer  
4
Correct Answer :

990


Explanation :
No Explanation available for this question

C1+2.C2+3.C3+…….+n.Cn =

1.  n.2n

2.  n.2n-1

3.  (n+1)2n

4.  (n+1)2n-1

View Answer  
4
Correct Answer :

n.2n-1


Explanation :
No Explanation available for this question
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