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Novay_Z [31]
3 years ago
12

Suppose a jar contains 7 red marbles and 21 blue marbles. if you reach in the jar and pull out 2 marbles at random at the same t

ime, find the probability that both are red.
Mathematics
2 answers:
Anit [1.1K]3 years ago
4 0
The probability is 1 out of 3 chance.
Tanya [424]3 years ago
4 0
 this can be answered a couple ways. it could be 7/30 or 21%.
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Mariah is randomly choosing three books to read from the following: 5 mysteries, 7 biographies, and 8 science fiction novels. Wh
Alinara [238K]
There are 20 C3 possible ways to choose 3 books to read.
There are 5 C3 possible ways to choose 3 mysteries to read.
The probability that Mariah will not choose all mysteries can be expressed as 1-5C3/20C3.  (These 3 Choices Are True)

There are 1 C3 possible ways to choose 3 books that are not all mysteries.
The probability that Mariah will choose 3 mysteries can be expressed as 1/5C3.
(These 2 Choices Are False)
Hope This Helps
7 0
3 years ago
Read 2 more answers
In a triangle , the measure of the first angle is twice the measure of the second angle. The measure of the third angle is 100 m
madam [21]

Answer:

The three unknown angles X, Y , and Z are:

X = 40, Y = 20, and Z = 120

Step-by-step explanation:

Let's name X the measure of the first angle, Y the measure of the second one, and Z that of the third one.

Then we can create the following equations:

X = 2 Y

Z = 100 + Y

and

X + Y + Z = 180

So we use the first equation and the second one to substitute for the variable X and Z in the thrid equation:

2 Y + Y + (100 + Y) = 180

4 Y + 100 = 180

4 Y = 80

Y = 80/4 = 20

Then X = 40, Y = 20, and Z = 120

7 0
3 years ago
What is the correct answer?
Valentin [98]

Answer:

Square Root of 384

Step-by-step explanation:

8 0
3 years ago
F(xth) if f(x) = 4x2+4x - 1
liraira [26]

I believe the answer would be   x = - 7/4

7 0
3 years ago
Whats the answer to this question
Liono4ka [1.6K]

Answer:

I believe it would be B.

Step-by-step explanation:

Range: area of variation with real numbers

Also, seeing the quadrant it is in means there are negative numbers. This takes out the possibility of option A.

4 0
3 years ago
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