If an event has occurred that changes the probability of the second event occurring, then you are calculating the probabilities of the dependent events. You can also express it as 0.25 or 25%.Ĭonsider the effect of previous events when calculating the probabilities of dependent events. If we take a random marble out of the jar, what is the probability of getting a red marble? The number of events in this problem is 5 (because there are 5 red marbles), and the resulting number is 20. Example 2 : In a jar there are 4 blue marbles, 5 red marbles and 11 white marbles.You can also express it as 0.285 or 28.5%.
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