Seven persons are to be seated in a row. The probability that two particular persons sit next to each other is
1). $\frac{1}{3}$
2). $\frac{1}{6}$
3). $\frac{2}{7}$
4). $\frac{1}{2}$
Serious health concerns in modem America are related to (1) (2)
(3) (4)
1). smoking
2). fast life
3). poor diet
4). loneliness
I will write a letter.
1). A letter is writing by me.
2). A letter will be written by me.
3). A letter has written to me-
4). A letter has been written by me.
Two roads XY and YZ of 15 metres and 20 metres length respectively are prepedicular to each other. What is the distance between X and Z by the shortest route ?
1). 35 metres
2). 30 metres
3). 24 metres
4). 25 metres
If A and B arc symmetric matrices of the same order, then ($A8^{T}$-$BA^{7}$) is
1). symmmetric
2). null matrix
3). skew symmetric
4). none of these