# The problems are from probability class.

1. In how many ways can 10 people sit in a row if

a. there are no restrictions

b. persons A and B must sit next to each other

c. there are 4 men and 6 women and the 4 men must sit next to each other

d. there are 5 sets of twins and each set of twins must sit together

e. there are 5 men and 5 women and no 2 men or 2 women can sit next to each other

https://brainmass.com/math/probability/problems-probability-class-32736

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1. In how many ways can 10 people sit in a row if

a. there are no restrictions

b. persons A and B must sit next to each other

c. there are 4 men and 6 women and the 4 men must sit next to each other

d. there are 5 sets of twins and each set of twins must sit together

e. there are 5 men and 5 women and no 2 men or 2 women can sit next to each other

Sol:

(a) The first seat can be filled by any of the 10 persons, the second by any of the remaining 9, the third by any of ...

#### Solution Summary

The problems that are from probability class are determined. The introductory course on probability are given.