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3 years ago

9

A box contains 9 red, 5 green, and 5 blue marbles. You reach in and remove 3 marbles all at once. Find the probability that the

tree marbles are all red.

1 answer:

Dafna1 [17]3 years ago

4 0

It would be 3/19. Cause you add all and that would be denom.

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8. At the beginning of the semester, a professor tells students that if they study for the tests, then there is a 55% chance the

Bezzdna [24]

Answer:

.8

Step-by-step explanation:

S= studies for

B= score of b or higher

we want P(S|B)

Using Bayes' theorem we can solve for the probability

$S|B=\frac{B|S*S}{B|S*S+B|S'*S'}=\frac{.55*.6}{.55*.6+.2*.4}=0.80487804878$

3 0

3 years ago

Write and solve an equation for the following.

Alenkinab [10]

Answer:

4+ $\frac{1}{2}$ x = 3

Step-by-step explanation:

4 + $\frac{1}{2}$ x = 3 (subtract 4 from both sides)

$\frac{1}{2}$ x = -1 (multiply both sides by 2)

x = -2

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3 years ago

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A person runs 1/7 mile in 1/56 hour.The person's speed is miles per hour.

Oduvanchick [21]

1 minute 8.25 seconds per mile

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3 years ago

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What is the answer to<br> y+2=5

Semenov [28]

5-2=3 so therefore y=3
Remember to work backwards and use opposite operations.

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3 years ago

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Please<br>Help me I don't get this!

Vikentia [17]

The 4 in and the 6 in are the same but the difference between the two triangles are 1.5

6:4 = 1.5
So if 12 = 1.5 (?)
The (?) = 8

4 0

2 years ago