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16 votes
A bag contains 6 brown, 8 white, and 4 black marbles. Each time you take a marble

out, you do not put it back into the bag. Find the Probability of pulling a black marble
and then another black marble. (In simplest form--always!)
P(black, black)

User Jantox
by
6.5k points

2 Answers

9 votes

Answer:

4.44

Explanation:

Total NM of ball=18,

black ball=4

p(black,black)=?

p(black,black)=p(b)+p(b)

4/18+4/18=4.44ans

User Arek Bal
by
6.7k points
10 votes

Answer:

  • 2/51

Explanation:

Total number of marbles:

  • 6 + 8 + 4 = 18

Probability of black marble:

  • p = 4/18 = 2/9

Without replacement, we have 3 black out of 17 total, then probability of the second black is:

  • p = 3/17

Required probability is:

  • p(black, black) = 2/9*3/17 = 2/51
User Odino
by
6.8k points