Probability - General Questions

One card is drawn at random from a well-shuffled pack of 52 cards. What is the probability that it is a red face card?

A number is chosen at random from 1 to 20. What is the probability that it is a multiple of 7?

One card is drawn at random from a well-shuffled pack of 52 cards. What is the probability that it is a black queen?

A bag contains 5 red, 7 blue and 5 green balls. Two balls are drawn at random. What is the probability that both are red?

A bag contains 3 red, 7 blue and 2 green balls. Two balls are drawn at random. What is the probability that both are red?