Presented with a deck of fifty-two cards (no jokers), what is the probability of drawing either a face card or a spade?

A coin is flipped four times. What is the probability of getting heads at least three times?

A coin is flipped seven times. What is the probability of getting heads six or fewer times?

Presented with a deck of fifty-two cards (no jokers), what is the probability of drawing either a face card or a spade?

A coin is flipped seven times. What is the probability of getting heads six or fewer times?

A coin is flipped four times. What is the probability of getting heads at least three times?

Some balls are placed in a large box, which include one ball marked , two balls marked , and continuing up to balls marked .

What is the probability that a ball randomly drawn from this box will be marked with a prime number?

Some balls are placed in a large box, which include one ball marked "A", two balls marked "B", three balls marked "C", and so forth up to twenty-six balls marked "Z".

A ball is drawn at random. Give the odds against the ball being marked "I".

Some balls are placed in a large box, which include ball marked "A", balls marked "B", balls marked "C", and so on up to balls marked "Z".

A ball is drawn at random. Give the probability that the ball will be marked "O".

Some balls are placed in a large box, which include one ball marked , two balls marked , and continuing up to balls marked .

What is the probability that a ball randomly drawn from this box will be marked with a prime number?