Four coins are tossed. The probability that at least one head turns up is:

There are $5$ horses in a race. Mr. $A$ selects $2$ horses at random and bets on them. What is the probability that the winning horse is among the horses selected by Mr. $A$ (in $/5$)?

In an experiment of tossing a coin and a fair die,the probability of getting a head on the coin and $6$ on the die is ..........

When three coins are tossed simultaneously,what is the probability of getting a head on the first,a tail on the second,and a head on the third?

$A$ bag contains $4$ white,$5$ black and $6$ red balls. If a ball is drawn at random,then what is the probability that the drawn ball is either white or red?

The probability of happening of an event $A$ is $0.5$ and that of $B$ is $0.3$. If $A$ and $B$ are mutually exclusive events,then the probability of neither $A$ nor $B$ is