$A$ balanced die is rolled twice. Then,the probability that the sum of numbers received in two trials is $12$ or less than $12$ is ...........

$A$ card is drawn at random from a well-shuffled pack of $52$ cards. Find the probability that the card drawn is that of diamonds.

There are $5$ white, $7$ red, $4$ black, and $2$ blue identical balls in a box. One ball is selected at random from the box. Find the probability that the ball is either black or white.

Two balanced dice are rolled. Find the probability that the sum of numbers on two dice is odd.

$A$ balanced die is rolled. The probability of receiving a number smaller than $3$ 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.