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nikklg [1K]
3 years ago
9

A bag contains 5 blue marbles, 6 red marbles, and 9 green marbles. Two marbles are drawn at random, one at a time and without re

placement. What is the probability of selecting two red marbles?
A.) 9/20

B.) 3/38

C.) 1/19

D.) 11/20
Mathematics
1 answer:
ArbitrLikvidat [17]3 years ago
5 0
Should be C. 1/19. because if there's 20 maebles in the bag and without replacing the marble then it actually would be 2/18
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Can some one help me asap
zavuch27 [327]
It'd be easier to do #18 if y ou were to break it up:

                                                        14* (first term + 14th term)
Sum from n=1 to 14 of n =  S      = ---------------------------------
                                               14                       2
                                    
     14(1+14)
= ---------------- = 7(15) = 105 
           2

The sum of twice that is 210.  The sum of "1 from n=1 to n=14" is just 14.

The final sum is 210 + 14 = 224 (answer)
4 0
3 years ago
5 1/3 divided by 7/8
charle [14.2K]
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6 0
3 years ago
24. If Jenna spent 30 hours on the computer this week. how much total time did she spend on
Verdich [7]

Option B) 3 hours is the time spent by Jenna on the e-mail this week.

<u>Step-by-step explanation:</u>

Jenna spent 30 hours on the computer this week.

The amount of time she spends on computer to work on various fields in given in the pie-chart.

This 30 hours represents her 100% work on computer.

From the figure shown,

She spent 10% of her total work on e-mail.

Therefore, 10% of 30 is the work done in hours by her on e-mail.

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⇒ 0.1 × 30

⇒ 3 hours

∴ Option B) 3 hours is the time spent by Jenna on the e-mail this week.

7 0
3 years ago
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Tju [1.3M]
2/11 ≈ 0.18    3/12 = 0.25. 

So the answer is no, 2/11 isn't bigger than 3/12. 

I hope this helps!
6 0
3 years ago
Read 2 more answers
What is the value of x and y
Anestetic [448]

Step-by-step explanation:

8y+17°=6x+7° (vertical opposite angle)

6x+7=3x-29. (interior angle on same side)

3x=-36

x=-12°

B=C

-72+7=-36-29

-65=-65

6 0
3 years ago
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