$A$ bag contains $3$ white and $5$ black balls. If one ball is drawn,then the probability that it is black,is

$A$ coin is tossed twice. What is the probability that at least one tail occurs?

The probability of obtaining an even prime number on each die,when a pair of dice is rolled,is . . . . . . .

From $10,000$ lottery tickets numbered from $1$ to $10,000$,one ticket is drawn at random. What is the probability that the number marked on the drawn ticket is divisible by $20$?

From a pack of $52$ cards,one card is drawn at random. The probability that it is either a king or a queen is:

$A$ card is drawn from a pack of $52$ cards. If $A =$ card is of diamond,$B =$ card is an ace,and $A \cap B =$ card is the ace of diamond,then events $A$ and $B$ are