The probability that an event will fail to happen is $0.05$. The probability that the event will take place on $4$ consecutive occasions is

$A$ Chartered Accountant applies for a job in $2$ firms $X$ and $Y$. The probability of his being selected in firm $X$ is $0.7$,and being rejected at $Y$ is $0.5$,and the probability of at least $1$ of his applications being rejected is $0.6$. What is the probability that he will be selected in $1$ of the firms?

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 $20$?

One card is drawn from each of two ordinary packs of $52$ cards. The probability that at least one of them is an ace of heart,is

If a number of two digits is formed with the digits $2, 3, 5, 7, 9$ without repetition of digits,what is the probability that the number formed is $35$?

$A$ die is rolled,find the probability that an even number is obtained.