Question

You want to make five-letter codes that use the letters A, F, E, R, and M without repeating any letter. What is the probability that a randomly chosen code starts with M and ends with E?

Answer 1

Pr(1st letter is M) x Pr(last letter is E given that the first letter is M)
1/5 x 1/4 = answer

The last one is 1/4 because after we know the first letter is M, there are 4 possibilities for the last letter

Answer 2

so it's .05

Answer 3

Correct. or 1/20

Answer 4

thank you!

Answer 5

no problem

Answer 6

could you possibly help me with another?

Answer 7

Yes.

Answer 8

thank you! it's another word problem :

A group of 8 friends (5 girls and 3 boys) plans to watch a movie, but they have only 5 tickets. How many different combinations of 5 friends could possibly receive the tickets?

Answer 9

The possibilities are
1. All 5 are girls
2. 4girls 1 boy
3. 3girls 2 boys
4. 2girls 3 boys

Do you know how to calculate combinations? C(n,r) = n! / r! (n - r)!
1. C(8,5)
2. C(8,4) x C(3,1)
3. C(8,3) x C(3,2)
4. C(8,2) x C(3,3)

Calculate each of those and add em up.
And I apologize but i have to run an errand for the next 15 minutes or so.

Answer 10

ok thank you so much

Answer 11

i got 56 thank you so much!!!!