How many marbles are in a box of marbles?
Ex 15.1, 9 A box contains 5 red marbles, 8 white marbles and 4 green marbles. One marble is taken out of the box at random. What is the probability that the marble taken out will be (i) red?
What is the value of P (marble taken out is not green)?
P (marble taken out is not green) = P (marble taken out is white) + P (marble taken out is red) = 8/17 + 5/17 = 13/17 Ex 15.1, 9 (Method 2) A box contains 5 red marbles, 8 white marbles and 4 green marbles. One marble is taken out of the box at random.
What is the probability of picking two pink marbles that are both pink?
The probability of picking 2 marbles that are both pink would be the product of the probability of choosing the first pink marble multiplied by the probability of choosing a second pink marble from the remaining marbles in the mix. This would be 1/2 * 4/9 = 2/9. To obtain the probability that is asked, simply compute 1 – (2/9) = 7/9.
6.) A box contains 30 marbles: 15 red, 10 blue, and 5 green. a) two marbles are selected with replacement. Find the probability that both marbles are red. b) Two marbles are selected without replacement. Find the probability of first selecting a blue then a green marble. 1. There is a total of 30 marbles in the box.
What are the odds of getting a non yellow marble?
like Sal mentioned a 3/8th chance That is roughly 37.5\% chance of picking a yellow marble leaving a 62.5\% chance of picking a non yellow marble (those add up to 100\%)
What is the probability that my first marble is red?
Since there are 15 red marbles and a total of 30 red marbles. The chances or probability that you just pulled out a red marble must be (you said it!) 15 out of 30. So the probability that your first marble is red is 15/30.
0.1333 A box contains 6 red marbles and 4 black marbles. Two marbles are drawn without replacement from the box. What is the probability that both of the marbles are black?
What is the probability of getting the second black marble?
After you get a red, now we need to calculate the probability of getting a second black. There was no replacement, so you have 1 black in your hand and 3 in the urn. There is a 3 9 probability of getting the second black marble. 9 marbles in total because you have one in your hand.
How many marbles are there in the urn?
An urn contains 6 red marbles and 4 black marbles. Two marbles are drawn without replacement from the urn. What is the probability that both of the marbles are black?
What is the probability of drawing a black from the urn?
There are 4 blacks to possible draw from the urn, there are 10 total marbles. So the probability of drawing 1 black is 4 10 . After you get a red, now we need to calculate the probability of getting a second black. There was no replacement, so you have 1 black in your hand and 3 in the urn.