# 1+(2/6)+(2.5/6.12)+(2.5.8/6.12.18)+……∞=

1.  21/3

2.  22/3

3.  42/3

4.  2-2/3

4

22/3

Explanation :
No Explanation available for this question

# 1+[(1/2).(3/5)]+[(1.3/2.4)(3/5)2]+[(1.3.5/2.4.6)(3/5)3]+-------∞=

1.  √(5/2)

2.  √(2/5)

3.  (1/2)√(5/2)

4.  √(5/3)

4

√(5/2)

Explanation :
No Explanation available for this question

# Coefficient of x4 in [(1-3x)2/(1-2x)] is

1.  1

2.  4

3.  3

4.  2

4

4

Explanation :
No Explanation available for this question

# In the expansion of (2-3x)-1 the 3rd term is

1.  9x2/4

2.  9x2/8

3.  27x3/8

4.  27x3/16

4

9x2/8

Explanation :
No Explanation available for this question

# The sum of the binomial coefficient of the 3rd,4th terms from the beginning and from the end of (a+x)n is 440 then n=

1.  10

2.  11

3.  12

4.  13

4

11

Explanation :
No Explanation available for this question

# If (1-x-x2)20=∑40r=0 ar.Xr, then a2+2a4+3a6+------+20a40=

1.  20

2.  40

3.  10

4.  -10

4

10

Explanation :
No Explanation available for this question

# If A and B are two mutually exclusive events then P(AUB)=

1.  P(A)+P(B)-P(A∩B)

2.  P(A)-2P(A∩B)

3.  P(A)+P(B)

4.  P(A).P(B)

4

P(A)+P(B)

Explanation :
No Explanation available for this question

# If A and B are two mutually exclusive events then P(A∩B)=

1.  P(A).P(B)

2.  P(A)

3.  0

4.  1

4

0

Explanation :
No Explanation available for this question

# From a box containing 10 cards numbered 1 to 10, four cards are drawn together. The probability that their sum is even is

1.  11/21

2.  5/21

3.  6/21

4.  1/21

4

11/21

Explanation :
No Explanation available for this question

1.  3/11

2.  4/11

3.  2/11

4.  5/11

4