20 find the theoretical probability of each outcome.

1. flipping 2 coins and 1 landing with heads showing, the other with tails showing.

2. randomly choosing a blue marble from a bag of 5 blue marbles, 8 red marbles, and 7 yellow marbles.

3. the probability of a spinner landing on yellow is 4/9. what is the probability of it not landing on yellow?

Step-by-step explanation:

1)

Probability for flipping one coin is 1/2

Probability for flipping two coins should be about 1/2 * 1/2 which is 1/4

There is a 1/4 chance

2)

First you must find the sum of all the marbles which would be 20

Now, put the blue marbles over the sum of 20 which is

5/20 or simplified to 1/4 which is the probability of choosing a blue marble

3)

If the probability of landing on yellow is 4/9, whatever is left is the probability of not landing on yellow which is 5/9

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step-by-step explanation:

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