$A$ coin is tossed $3$ times. The probability of obtaining at least two heads is

In a competition,$A, B$,and $C$ are participating. The probability that $A$ wins is twice that of $B$,and the probability that $B$ wins is twice that of $C$. Then,the probability that $A$ loses is:

If $P(A \cup B)=0.8$ and $P(A \cap B)=0.3$, then $P(\bar{A})+P(\bar{B})$ is equal to:

$A$ problem in statistics is given to three students $A, B$ and $C$. Their probabilities of solving the problem are $\frac{1}{2}, \frac{1}{3}$ and $\frac{1}{4}$ respectively. If all of them try independently,then the probability that the problem is solved is

If $A$ and $B$ are any two events,then $P(\bar{A} \cap B) = $

$A$ die is thrown. Find the probability of the following event: $A$ number less than or equal to $1$ will appear.