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 $/10$)

In any situation that has only two possible outcomes,each outcome will have a probability of $\frac{1}{2}$. True or false? Why?

$A$ card is drawn at random from a well-shuffled pack of $52$ cards. The probability that the card drawn is an ace of a red suit is ...........

$A$ student says that if you throw a die,it will show up $1$ or not $1$. Therefore,the probability of getting $1$ and the probability of getting 'not $1$' each is equal to $\frac{1}{2}$. Is this correct? Give reasons.

$A$ balanced die is rolled twice. Then,the probability of the sum of numbers received in these two trials being even is ...........

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