Find probability that the
boys are seated next to each other.
In a movie theater,
boys and
girls are randomly seated together in a row.
Probability of
boys are not seated next to each other.
In this arrangement first of all arrange
girls in
ways.
The arrangement is _girl_girl_girl_.
\Now placing the boys beside the girls seated.
\
boys can be seated in
places beside the girls is
ways.
Probability of
boys are not seated next to each other is
.
Use formula
.

Probability that the
boys are seated next to each other.
.
Probability that the
boys are seated next to each other is
.
Probability that the
boys are seated next to each other is
.