An unbiased coin is tossed thrice. The probability of getting a tail all three times is ...........

There are boards numbered $1$ to $50$ in a box. One board is selected at random. Find the probability that the number on the board is a multiple of $10$. (in $/10$)

If $P(A) : P(\bar{A}) = 3 : 4$,then $P(A) =$ .........

Two balanced dice are rolled simultaneously. Then,the probability that the sum of numbers on the dice is $2$ is ............

$A$ card is drawn at random from a well-shuffled pack of $52$ cards. The probability of that card being a picture card is ...........

$A$ student attends a $50$ mark test. No negative marks are given in the test. Find the probability that he scores $30$ or $35$ marks.