Using the letters in the word MYOGRAPHS, in how many ways could a group of 6 letters be chosen? What is the probabililty that in this group of 6 letters the M is chosen?
I can't get the second part of the question. For the first part, I did 9C6 and got 84. Please help! Thanks!
2007-05-23 20:03:03 · 2 answers · asked by SPINK 2 in Science & Mathematics ➔ Mathematics
For the second part, you need to work out how many ways you can choose 6 letters if one of them must be the M.
Well, you need to choose the M, and you need to choose 5 other letters from the 8 remaining, so the answer is 8C5 = 56. So the probability of choosing the M is 56/84 = 2/3 - as you would expect, since all the letters are equivalent and you're choosing 2/3 of them...
2007-05-23 20:06:37 · answer #1 · answered by Scarlet Manuka 7 · 0⤊ 0⤋
if you put M in the group u have 8C5 other option
the probability is
(8C5)/(9C6)
2007-05-24 03:07:26 · answer #2 · answered by Mamad 3 · 0⤊ 0⤋