1.Six points lie on the circumference of a circle. How many quadrilaterals can be formed by connecting 4 points?

2.Assuming repeats are allowed, how many positive three-digit numbers can be formed using only the the digits 5, 6, 7, 8?

3.Using the digits0, 1, 2, 3, 4and allowing the repetition of digits, how many positive odd 4-digit numbers can be formed?

4.How many 5 digit numbers can be made using1,1,1,3,3exactly once?

5.Using the digits0, 1, 2, 3, 4and not allowing the repetition of digits, how many positive 4-digit numbers ending in 2 can be formed?

6.Out of a group of twelve students, three are to be selected at random to read their papers. How many different groups of three students students can be chosen?

7.How many 13 card hands can have exactly 1 spade, 10 clubs, and 2 red cards when dealt from a standard 52 card deck? Note that a standard deck has 13 spades, 13 clubs and 26 red cards.

8.How many positive five digit numbers end in a 5?(Digits can be repeated.)

9.A 5-card hand is dealt from a standard deck of 52 cards. Find the probability, correct to 7 decimal places, that the 5-card hand contains no spades. There are 13 spades in the deck...