Recall from Example 1 that whenever Suzan sees a bag of marbles, she grabs a handful at random. She has seen a bag containing four red marbles, three green ones, two white ones, and three purple ones. She grabs five of them. Find the probability of the following event, expressing it as a fraction in lowest terms. HINT [See Example 1.] She has two red ones and one of each of the other colors.

Step-by-step explanation:

Red=4

Green=3

White=2

Purple=3

Total=4+3+2+3=12

She wants to pick 5 out of 12 marbles from.

n(S)=12C5=792

Let A= Event of Picking 2 Red, and one of each of the other colours.

n(A)=(5C2)*(3C1)*(2C1)*(3C1)

=10*3*2*3=180

Therefore:

The Probability of picking two reds and one of each other color is .

water molecules will move from the side of higher water concentration to the side of lower concentration until both solutions are isotonic. at this point, equilibrium is reached. in an isotonic solution, the flow of water in and out of the cell is happening at the same rate.

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