Marbles Bag Probability

This math education video demonstrates how to calculate the probability of removing colored marbles from a bag.

Marbles bag probability.

The probability the first marble you pick is red is of course 19 40. 2 blue and 3 red marbles are in a bag. The probability that the second marble is red is 18 39. For example a marble may be taken from a bag with 20 marbles and then a second marble is taken without replacing the first marble.

What are the chances of getting a blue marble. The chance is 2 in 5 but after taking one out the chances change. Find the probability of pulling a yellow marble from a bag with 3 yellow 2 red 2 green and 1 blue i m assuming marbles. Change the problem such that the number of green marbles is a two digit number.

Number and color of marbles in the bag replacement rule. On a mission to transform learning through computational thinking shodor is dedicated to the reform and improvement of mathematics and science education through student enrichment faculty enhancement and interactive curriculum development at all levels. Probability examples a jar contains 30 red marbles 12 yellow marbles 8 green marbles and 5 blue marbles what is the probability that you draw and replace marbles 3 times and you get no red marbles. Using the digits 1 to 9 at most one time each fill in the boxes to make the probability of drawing a red marble from either bag the same.

The probability of picking a yellow marble. The law of total probability helps here. Problems demonstrate non conditional and cond. Now there are 38 marbles left and 17 are red.

So they say the probability i ll just say p for probability. And so this. This is called probability without replacement or dependent probability. There are 55 marbles 25 of which are not red.

If the transferred marble was white which happens 3 5 of the time the probability that the marble drawn from bag b is white is 5 8. Now there are 39 marbles left and 18 are red. The sample space for the second event is then 19 marbles instead of 20 marbles.