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sergij07 [2.7K]
2 years ago
13

?/1 A box contains 5 red marbles and 7 green marbles. Find the probability of drawing a green marble and not returning it to the

box and then drawing a red marble?
Mathematics
1 answer:
Lady bird [3.3K]2 years ago
6 0

Answer: 35/132

Step-by-step explanation:

probability of drawing green marble: 7/12

since the green marble drawn won't be returned to the box, the new total amount of marbles in the box is 11.

probability of red marble: 5/11

then multiply the 7/12 and 5/11 together:

35/132 which is abut 26.5%

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I have some geometric sequence questions, will give 5 points for every answer and will give Brainliest!
kherson [118]

Answer:

Step-by-step explanation:

1) since the sixth term is 3 and the fifth term 24, the common ratio would be 3/24 = 1/8

The formula for finding the nth term of a geometric sequence is

Tn = ar^(n - 1)

If t6 = 3,r = 1/8, then

3 = a × 1/8^(6 - 1) = a × (1/8)^5

a = 3/(0.125)^5 = 98304

The first term is 98304.

Second term is 98304 × 1/8 = 12288

Third term is 12288 × 1/8 = 1536

Third term is 1536 × 1/8 = 192

2) t1 = 4

t2 = - 3t(2- 1) = - 3t1 = - 3 × 4 = - 12

t3 = - 3t(3- 1) = - 3t2 = - 3 × - 12 = 36

t4 = - 3t(4- 1) = - 3t3 = - 3 × 36 = - 108

3) let the numbers be t2,t3 and t4

The sequence becomes

1/2, t2,t3, t4,8

The formula for finding the nth term of a geometric sequence is

Tn = ar^(n - 1)

8 = 1/2 × r^(5 - 1)

8 = 1/2 × r^4

16 = r^4

2^4 = r^4

r = 2

t2 = 1/2 × 2 = 1

t3 = 1 × 2 = 2

t4 = 2 × 2 = 4

5 0
2 years ago
Divide 49p in the ratio of 4:2:1
frozen [14]

4+2+1=7

49p/7=7p

4units:2units:1unit

4 times 7p=28p

2 times 7p=14p

1 times 7p=7p

divided it is

28p:14p:7p

7 0
3 years ago
Pls help me i will give brainliest
qwelly [4]

Answer:

both the groups have the same value for the first quartile

7 0
3 years ago
Solve for x.<br> Your answer must be simplified.<br> 17r &gt; -17
Snowcat [4.5K]

Hello :D

Answer:

\boxed{R>-1}

The answer should have a negative sign.

Step-by-step explanation:

First, you do is divide by 17 from both sides of an equation.

\frac{17r}{17}>\frac{-17}{17}

Then, you simplify and solve to find the answer.

-17\div17=-1

\boxed{R>-1}, which is our answer.

I hope this helps you!

Have a great day! :D

4 0
3 years ago
Read 2 more answers
The pool at "splash around" is open for 14 weeks during the summer. you can swim for $6 a session, or you can buy a membership f
Ratling [72]

Let

x--------> the number of sessions

y-------> the total payment

we know that

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with membership:

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see the attached figure

the solution is the point (50,300)

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the cost is \$300 in both forms

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to justify buying the membership

x > 50\ sessions

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<u>the answer is</u>

x > 50\ sessions


3 0
3 years ago
Read 2 more answers
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