1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Vikentia [17]
3 years ago
12

A bag of marbles has 15 blue, 18 green, 6 yellow, and 10 red marbles. How many marbles need to be added to the bag so the probab

ility of drawing a red marble is 20% or 1/5
Mathematics
2 answers:
skelet666 [1.2K]3 years ago
5 0

Answer:

One marble (other than red)

Step-by-step explanation:

The total number of marbles is 15 + 18 + 6 + 10 = 49. The probability of drawing a red marble is 10 out of 49. We want to change those odds to 10 out of 50 (or 20%). Therefore, we need to add <em>one</em> marble; any color other than red will work.

Keith_Richards [23]3 years ago
3 0

Answer:

1 marble needs to be added

Step-by-step explanation:

So we know that there are 15 blue marbles, 18 green, 6 yellow, and 10 red. We are trying to find out how may marbles must be added to the bag so that there is a 1/5 or 20% chance of drawing a red marble. Lets find out how many marbles should be in the bag (NOT added to the bag, we will find that later) so that the chance of drawing a red one is 1/5. To do this, we can make this equation:

\frac{10}{T}=\frac{1}{5}

Where T is the total number of marbles that should be in the bag. Lets solve this for T:

\frac{10}{T}=\frac{1}{5}

Cross multiply.

T = (10)(5)

T = 50

So now we know that the total number of marbles that should be in the bag to make the chance of drawing a red 1/5 is 50. Now we can subtract the number of marbles that are currently in the bag from 50 to find the number of marbles to add.

50 - (15 + 18 + 6 + 10) = 50 - 49 = 1

So 1 marbles has to be added so that the chance of drawing a red marble is 1/5.

I hope you find my answer and explanation helpful. Happy studying. :)

You might be interested in
......................<br> 4 x4 x4 x5 x5
Alina [70]
The Answer is 1600
Hope this helps :)
7 0
3 years ago
Read 2 more answers
To make Diane's special punch it take 4 cups of juice for every 7 cups of Lime soda. How much juice will be needed if we have 21
stiks02 [169]

Answer:

Step-by-step explanation:

4 cups of J for every 7 cups of soda  4:7

21 cups of soda will take 12 cups of J

If you take the 7 and multiply by 3 you get the 21.

So you will need to multiply the 4 by the 3 to get the 12. You need to keep everything in proportion.

4:7   same as 12:21

4 0
3 years ago
Evaluate the expression 3^4 ÷ (14 − 5) × 2.
gavmur [86]

Answer:

18

Step-by-step explanation:

3^4=9*9=81

14-5=9

81/9=9

9*2=18

8 0
3 years ago
Read 2 more answers
PLEASE HELP ASAP!! I REALLY NEED HELP!
rewona [7]
The length is 37in. The width is 7in.
8 0
3 years ago
Read 2 more answers
Mr. Chen is painting one wall of a room in his attic. He needs to detemine the area of the wall so he will know how much paint h
MAVERICK [17]

Area of the figure

= (area of rectangle) + (area of triangle)

= (8 × 10) + (½ × 4 × 8)

= 80 + 16

= 96

Area = 96ft²

Quarts of paint needed

= 96/22

= 48/11

= 4.36

Mr. Chen will have to buy 5 quarts of paint.

8 0
2 years ago
Other questions:
  • What Are The Answers? I Will give Brainliest Answer. (ASAP)
    5·1 answer
  • What is 18.386 rounded to the nearest Hundred
    7·1 answer
  • Kendall bought a wallet for $27 after a 45% discount was taken off. If $27 was the sale price of the wallet, what was the origin
    10·1 answer
  • H. E. L. P. ???!!!!!!​
    5·1 answer
  • Jesus loves you all have a blessed morning
    7·1 answer
  • Very urgent. Please help
    7·2 answers
  • I needd help is due today at 3pm qnq!!
    7·1 answer
  • Discribe the sides of polygon c
    10·1 answer
  • Ill give 20 points if you help me out!!
    10·2 answers
  • Which algebraic expression is equivalent to this expression?
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!