Please help me! I'm so confused! Please include all steps AND helpful tips that will help me solve these kinds of problems (problems with probability and combinations)! Thanks a lot!

A 5 card hand is dealt from a deck of 52 cards what is the probability that none of them are queens?

A 7 card hand is dealt from a deck of 52. What is the probability that the hand includes all four kings?

Eleven dimes where tossed. Find the probability that the 7th one only was heads.

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