A bag contains 9 red marbles, 7 white marbles, and 9 blue marbles. You draw 5...

Question

Question

A bag contains 9 red marbles, 7 white marbles, and 9 blue marbles. You draw 5 marbles out at random, without replacement. Wri

Answer 1

Answer #1

There are total 25 marbles in the bag
5 marbles can be selected in 25C5 ways

a)
5 red marbles can be selected in 9C5 ways

P(all red marbles) = 9C5/25C5 = 126/53130
= 3/1265

b)
if no red marble is selected, this can be done in 16C5 ways

P(no red marbles selected) = 16C5/25C5
= 4368/53130
= 104/1265

Answer 2

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