hree young brother-sister pairs from different families need to take a trip in a van. These six children will occupy the second and third rows in the van, each of which has three seats. To avoid disruptions, the siblings may not sit right next to each other in a row and no child may sit directly in front of his or her sibling. How many seating arrangements are possible for this trip

A First Course in Probability (10th Edition)
10th Edition
ISBN:9780134753119
Author:Sheldon Ross
Publisher:Sheldon Ross
Chapter1: Combinatorial Analysis
Section: Chapter Questions
Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...
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9/ Three young brother-sister pairs from different families need to take a trip in a van. These six
children will occupy the second and third rows in the van, each of which has three seats. To
avoid disruptions, the siblings may not sit right next to each other in a row and no child may sit
directly in front of his or her sibling. How many seating arrangements are possible for this trip?

10/ 11. How many 5 digit positive integers are divisible by 5 and have at least one 6 as their digit?

9. Three young brother-sister pairs from different families need to take a trip in a van. These six
children will occupy the second and third rows in the van, each of which has three seats. To
avoid disruptions, the siblings may not sit right next to each other in a row and no child may sit
directly in front of his or her sibling. How many seating arrangements are possible for this trip?
Transcribed Image Text:9. Three young brother-sister pairs from different families need to take a trip in a van. These six children will occupy the second and third rows in the van, each of which has three seats. To avoid disruptions, the siblings may not sit right next to each other in a row and no child may sit directly in front of his or her sibling. How many seating arrangements are possible for this trip?
11. How many 5 digit positive integers are divisible by 5 and have at least one 6 as their digit?
Transcribed Image Text:11. How many 5 digit positive integers are divisible by 5 and have at least one 6 as their digit?
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