For each of the following problems, you should write your answer as an expression. You do not need togive the final numeric value. For example, if your answer is the number of 6-permutations of a set with 10elements, you should write P(10, 6) or 10!/4! or 10 × 9 × 8 × 7 × 6 × 5, but not 151200.How many ways are there to choose 6 items from 10 distinct items if...a ...the order of the items matters and repetition of items is not allowed?b... the order of the items matters and repetition of items is allowed?с ... the order of the items does not matter and repetition of items is not allowed?d... the order of the items does not matter and repetition of items is allowed?

SOLUTION :a. The order of the items matters, and repetition of items is not allowed.When the order…

Answered: For each of the following problems, you…

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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For each of the following problems, you should write your answer as an expression. You do not need to give the final numeric value. For example, if your answer is the number of 6-permutations of a set with 10 elements, you should write P(10,6) or 10!/4! or 10 x 9 x 8 x 7 x 6 x 5, but not 151200. How many ways are there to choose 6 items from 10 distinct items if... a ... the order of the items matters and repetition of items is not allowed? b... the order of the items matters and repetition of items is allowed? C... the order of the items does not matter and repetition of items is not allowed? d... the order of the items does not matter and repetition of items is allowed?
For each of the following problems, you should write your answer as an expression. Do not give the final numeric value. For example, if your answer is the number of 6-permutations of a set with 10 elements, you should write P(10,6) or 10!/4! or 10 x 9×8× 7 × 6 × 5, but not 151200. The English alphabet contains 26 letters. How many ways are there to choose 14 letters of the alphabet if...
If A={8,12,16,20} and B={12,16,20,24,28}, what is the value of P (A and B)?
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Please explain why this is the correct answer.
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