For independent events ${A_1},\,{A_2},\,..........,{A_n},$ $P({A_i}) = \frac{1}{{i + 1}},$ $i = 1,\,\,2,\,......,\,\,n.$ Then the probability that none of the event will occur, is
$\frac{n}{{n + 1}}$
$\frac{{n - 1}}{{n + 1}}$
$\frac{1}{{n + 1}}$
None of these
The probability of getting number $5$ in throwing a dice is
The probability of a sure event is
Three identical dice are rolled. The probability that same number will appear on each of them will be
The probability that an ordinary or a non-leap year has $53$ sunday, is
A box contains $2$ black, $4$ white and $3$ red balls. One ball is drawn at random from the box and kept aside. From the remaining balls in the box, another ball is drawn at random and kept aside the first. This process is repeated till all the balls are drawn from the box. The probability that the balls drawn are in the sequence of $2$ black, $4$ white and $3$ red is