The probability of drawing a white ball from a bag containing $3$ black balls and $4$ white balls, is
$\frac{4}{7}$
$\frac{3}{7}$
$\frac{1}{7}$
None of these
(a) Required probability $ = \frac{4}{7}$.
Find the probability that the two digit number formed by digits $1, 2, 3, 4, 5$ is divisible by $4$ (while repetition of digit is allowed)
A card is drawn from a well shuffled pack of cards. The probability of getting a queen of club or king of heart is
If two balanced dice are tossed once, the probability of the event, that the sum of the integers coming on the upper sides of the two dice is $9$, is
The chance of getting a doublet with $2$ dice is
If three students $A, B, C$ independently solve a problem with probabilitities $\frac{1}{3},\frac{1}{4}$ and $\frac{1}{5}$ respectively, then the probability that the problem will be solved is
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