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2 years ago

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A bag contains 40 marbles, 4 of which are blue, 10 are red, 25 are green, and 1 is purple. Shawna takes a marble out of the bag,

records the color, and returns it to the bag. How many green marbles should she expect after 400 trials?

1 answer:

viktelen [127]2 years ago

3 0

The answer is 25/400 because it is 25 green marble and it 400 in all

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3 years ago

The probability of drawing a pearl bead out of a bag of mixed beads is 2/3. What is the probability of drawing a bead which is n

Georgia [21]

Answer:

$\frac{1}{3}$ probability of drawing a bead which is not a pearl

Step-by-step explanation:

For each bead that you draw, there are only two possible outcomes. Either it is a pearl bead, or it is not. The sum of these probabilities = 100% = 1.

So

2/3 probability of drawing a pearl bead.

p probability of drawing a non pearl bead.

What is the probability of drawing a bead which is not a pearl?

$p + \frac{2}{3} = 1$

$p = 1 - \frac{2}{3}$

$p = \frac{3*1 - 2}{3}$

$p = \frac{1}{3}$

$\frac{1}{3}$ probability of drawing a bead which is not a pearl

7 0

2 years ago