If one letter is chosen at random from the word "MATHEMATICS", find the probability of getting S.

If one letter is chosen at random from the word "MATHEMATICS", find the probability of getting a vowel.

A card is drawn from a well-shuffled deck of $52$ cards. Find the probabilities of each of the following: a black card

A card is drawn from a well-shuffled deck of $52$ cards. Find the probabilities of each of the following: a king

A card is drawn from a well-shuffled deck of $52$ cards. Find the probabilities of each of the following: not a spade.

A card is drawn from a well-shuffled deck of $52$ cards. Find the probabilities of each of the following: an ace.

A card is drawn from a well-shuffled deck of $52$ cards. Find the probabilities of each of the following: an ace of spade.

The probability of an event whose likelihood of occurrence and non-occurrence is same is:

A bag contains $10$ marbles of which $8$ are red. One marble is drawn at random. The probability that it is not red is: