WEST BENGAL JOINT ENTRANCE EXAMINATION,2011

MATHEMATICS

( English Version )

1. 4 boys and 2 girls occupy seats in a row at random. Then the probability that the two girls occupy seats side by side is

A. B. C. D.

2. A coin is tossed again and again. If tail appears on first three tosses, then the chance that head appears on fourth toss is

A. B. C. D.

3. The coefficient of xn in the expansion of x^{n} in the expansion of

A. B. C. D.

4. The sum of the series

A. B. C. D.