SOLUTION: : A bag contains 7 red marbles labeled {1,2,3,4,5,6,7} and 5 green marbles labeled {1,2,3,4,5}. Four marbles are pulled out at once (i.e. with no particular order). What is the

Algebra ->  Probability-and-statistics -> SOLUTION: : A bag contains 7 red marbles labeled {1,2,3,4,5,6,7} and 5 green marbles labeled {1,2,3,4,5}. Four marbles are pulled out at once (i.e. with no particular order). What is the       Log On


   



Question 739508: : A bag contains 7 red marbles labeled {1,2,3,4,5,6,7} and 5 green marbles labeled
{1,2,3,4,5}. Four marbles are pulled out at once (i.e. with no particular order). What is the
probability that (10 marks)
(a) all four marbles are red?

Found 2 solutions by Edwin McCravy, AnlytcPhil:
Answer by Edwin McCravy(20060) About Me  (Show Source):
You can put this solution on YOUR website!

The set of marbles consists of:

{1, 2, 3, 4, 5, 6, 7, 1, 2, 3, 4, 5} 

7_red_marbles_choose_4%2F12_marbles_choose_4%22%22=%22%2235%2F495%22%22=%22%227%2F99

Edwin

Answer by AnlytcPhil(1807) About Me  (Show Source):
You can put this solution on YOUR website!

The set of marbles consists of:

{1, 2, 3, 4, 5, 6, 7, 1, 2, 3, 4, 5} 

7_red_marbles_choose_4%2F12_marbles_choose_4%22%22=%22%22%22C%287%2C4%29%22%2F%22C%2812%2C4%29%22%22%22=%22%2235%2F495%22%22=%22%227%2F99

Edwin