twenty people with two sisters among them want to sit around a table such that the two sisters sit together. what is the possibility that the two sisters would sit together?
Answers
Given : twenty people with two sisters among them want to sit around a table such that the two sisters sit together.
To Find : what is the possibility that the two sisters would sit together
Solution:
20 people can sit around table in 19 ! Ways
Taking two sister as 1
we have 1 + 18 = 19 peopel
19 people can sit around table in 18 ! Ways
2 girls can sit in 2 Ways
= 2 * 18 !
possibility that the two sisters would sit together = 2 * 18 ! / 19 !
= 2/19
2/19 is the probability that two sisters would sit together
Learn More:
In how many ways can 12 people sit around a table so that all shall ...
https://brainly.in/question/7785828
3 men and 3 women are sit at a round table in how many ways can ...
https://brainly.in/question/8363377