Question

1: A box contains 95 pink rubber bands and 90 brown rubber bands. You select a rubber band at random from the box. Find each probability. Write the probability as a fraction in simplest form.

A). Find the theoretical probability of selecting a pink rubber band.

B). Find the theoretical probability of selecting a brown rubber band.

C). You repeatedly choose a rubber band from the box, record the color, and put the rubber band back in the box. The results are shown in the table below. Find the experimental probability of each color based on the table

Pink: 36
Brown: 33

2: The diagram below shows the contents of a jar from which you select marbles at random.

Four red marbles
Seven blue marbles
Five green marbles

A). What is the probability of selecting a red marble, replacing it, and then selecting a blue marble? Show your work.

B). What is the probability of selecting a red marble, setting it aside, and then selecting a blue marble? Show your work.

C). Are the answers to parts A) and B) the same? Why or why not?

The answer to C on 2 is because by replacing the red marble, you've added another number to probability. By setting it aside you're making it simpler. Am I right?

Thanks!~

Answer 1

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