### Probability of dice, coin flips, and deck of cards.

1. A die is tossed 7 times, find the chance that (a) all rolls show 2 or less (b) none of the rolls show 2 or less (c) not all show 2 or less 2. A coin is tossed 4 times, find the chance that (a) all rolls are Heads (b) the 1st two tosses are Head and last two are Tails (c) the 4th is a Head, given the 1st 3 are