Problem 1. We wish to form a 5 digit number using the digits 1, 2, ..., 9. The constraint is that none of the digits should appear more than twice. How many numbers can be formed respecting this constraint?

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Q: Hello, thank you for your quick response, however, when I plug the answers that you gave me into the…

A: The answer is in step 2.

Q: ing in the addition problem 167 + 59. Draw (sim- Describe how to use bundled toothpicks (or bundles…

A: Solution: 167 + 59 We are showing pictorial representation is given below

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Q: Problem 2 Let A, B, and C be sets. 1. By means of an example show that AUC=BUC does not necessarily…

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A: To determine the number of elements in the set (A union B)' (the complement of the union of A and B.…

Q: Problem 5

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Q: 4. What is the number of different ways to divide a group of 20 people equally into 2 sub-groups?

A: Permutation and combinations

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A: Answer:- Given that There is a safe that has a passcode of three digits.  Every digit can be a…

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Q: Currently, lecture A has 68 students enrolled. Let’s say we gave an assignment  with 7 questions to…

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Q: In September, October, and November, a student solves at least one problem per day but not more than…

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