Marble Simple Probability Examples Trees

This video goes through 2 examples of probability.

Marble simple probability examples trees.

One example uses with replacement and one example uses without replacement. This means the first two are not red. Another way of representing 2 or more events is on a probability tree. We calculated p drawing a non red 455.

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. We ll use the following model to help calculate the probability of simple events. This is called probability without replacement or dependent probability. Again we ll have to think about the possible outcomes first.

A coin is biased so that it has a 60 chance of landing on heads. If it is thrown three times find the probability of getting a three heads b 2 heads and a tail c at least one head. Dependent events are what we look at here. Use these examples of probability to guide you through calculating the probability of simple events.

The first red a jar contains 30 red marbles 12 yellow marbles 8 green marbles and 5 blue marbles you draw and replace marbles 3 times. There are 3 balls in a bag. Problems demonstrate non conditional and cond. One ball is picked out and not replaced and then another ball is picked out.

This is the currently selected item. The probability is 1 3 for each of these. Red yellow and blue. The probability of picking a yellow marble.

Probability is the chance or likelihood that an event will happen. We can use a tree diagram to help us find the probability. In this example we are figuring out the probability of randomly picking a non blue marble from a bag. There is a 2 5 chance of pulling out a blue marble and a 3 5 chance for red.

We can go one step further and see what happens when we pick a second marble. So they say the probability i ll just say p for probability. The first ball can be red yellow or blue. And so this is sometimes the event in question right over here is picking the yellow marble.

This math education video demonstrates how to calculate the probability of removing colored marbles from a bag. It is the ratio of the number of ways an event can occur to the number of possible outcomes. What is the probability the third marble is the first red marble. The sample space for the second event is then 19 marbles instead of 20 marbles.