Question

How many five-letter sequences are possible that use the letters q, u, a, k, e, s at most once each?

Probability and combinatorics
ANSWERED
asked 2021-09-15
How many five-letter sequences are possible that use the letters q, u, a, k, e, s at most once each?

Expert Answers (1)

2021-09-16

There are 6 letters. you are using 5 of them, and none can be repeated. So 6 choices for the 1st letter. 5 choices for the 2nd letter. ... etc.

Answer: \(\displaystyle{6}\cdot{5}\cdot{4}\cdot{3}\cdot{2}={720}\)

48
 
Best answer

expert advice

Have a similar question?
We can deal with it in 3 hours
...