1. How many ways are there to select 7 unordered elements from a set of three el
ID: 663433 • Letter: 1
Question
1. How many ways are there to select 7 unordered elements from a set of three elements when repetition is allowed? 2. How 18-letter strings can be made with three As, four Bs, two Cs, and nine Ds? 3. How many different combinations of pennies, nickels, dimes, and quarters can a piggy bank have in it if it contains 30 coins? 4. How many different strings with five or more letters can be made form the letters in SEERESS? 5. How many solutions are there to the equation x1+x2+x3+x4+x5 = 30 with nonnegative integers? 6. How many solutions are there Lo the equation x1+x2+x3+x4+x5 = 30 with positive integers? 1. What is the probability that a three-card hand has three distinct ranks? 2. What is the probability that in a six-card hand you have three pairs of all different ranks? 3. You draw two balls out of a box that contains 15 red balls and 20 green balls. (a) What is the probability that you get one red ball and one green ball if you replace the balls as you pick them? (b) What is the probability that you get one red ball and one green ball if you do not replace the balls as you pick them?Explanation / Answer
1. We can predict by its movemnet.
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