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jekas [21]
2 years ago
12

A bag contains 9 marbles: 3 are green, 2 are red, and 4 are blue. Bob chooses a marble at random, and without putting it back, c

hooses another one at
random. What is the probability that both marbles he chooses are red? Write your answer as a fraction in simplest form.
DO
Mathematics
1 answer:
kvasek [131]2 years ago
8 0

Answer: 1/18

Step-by-step explanation:

9 total marbles

2 red

so the first time he picks it would be a 2/9 chance of the marble being red

the second time there would be 8 total marbles and 2 red, so it would be a 2/8 or 1/4 chance.

the probability is found by doing 2/9*1/4 which equals 2/36 or 1/18.

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Write an equation.
schepotkina [342]

Given:

y is proportional to x.

y=10 and x=8.

To find:

The constant of proportionality and the equation for the proportional relationship.

Solution:

y is proportional to x.

y\propto x

y=kx               ...(i)

Where, k is the constant of proportionality.

Putting y=10 and x=8, we get

10=k(8)

\dfrac{10}{8}=k

\dfrac{5}{4}=k

Putting k=\dfrac{5}{4} in (i), we get

y=\dfrac{5}{4}x

Therefore, the contestant of proportionality is k=\dfrac{5}{4} and the equation for the proportional relationship is  y=\dfrac{5}{4}x.

5 0
2 years ago
Which figure has at least one line of symmetry?
CaHeK987 [17]

Answer:

the second green shape because the first one is a rectangle which has 2 equal sides

6 0
2 years ago
What's the comparison to 5 + 4
amm1812
6 + 3 or you could do 4.5 + 4.5. but the first one is probably what they're looking for.
8 0
3 years ago
What is the solution to the equation fraction 4 over 5 n minus fraction 1 over 5 equals fraction 2 over 5 n?
photoshop1234 [79]

Answer:

value of n = 2

Step-by-step explanation:

\frac{4}{5n}-\frac{1}{5}=\frac{2}{5n}

We need to solve the above equation.

Find Least Common multiplier from 5n, 5 = 5n

Multiply both sides of the equation by 5n

\frac{4}{5n}*5n-\frac{1}{5}*5n=\frac{2}{5n}*5n\\Solving:\\4 -n = 2\\

Now finding the value of n.

Adding -4 on both sides

4 -n-4 = 2-4\\-n= -2

Multiplying both sides by -1

n = 2

The value of n is 2.

We can verify by putting value of n in the given question.

\frac{4}{5n}-\frac{1}{5}=\frac{2}{5n}\\n=2\\\frac{4}{5*2}-\frac{1}{5}=\frac{2}{5*2}\\\frac{4}{10}-\frac{1}{5}=\frac{2}{10}\\\frac{2}{5}-\frac{1}{5}=\frac{1}{5}\\\frac{2-1}{5}=\frac{1}{5}\\\frac{1}{5}=\frac{1}{5}

So, value of n = 2

5 0
2 years ago
Find the volume of this cylinder. <br><br><br> As soon as possible please..
Alexxandr [17]

Answer:

144

Step-by-step explanation:

V=PIr^2h

PI=3

V=3r^2h

r=2  h=12

V=3(2^2)12

V=3(4)12

V=12(12)

V=144in^3

3 0
3 years ago
Read 2 more answers
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