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Alchen [17]
4 years ago
12

If a bag has 40 red and blue marbles and a quarter of them are red what is the probability of picking a blue one

Mathematics
1 answer:
ella [17]4 years ago
7 0
Total marbles = 40 & 1/4  (or 0.25) are, then RED = 40x 0.25 = 10

If RED = 10 then BLUE = 30

P(picking one blue) = 30/40 = 3/4 =0.75
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Priya mixes 2 1/2 cups of water with 1/3 cup of orange juice concentrate. Diego mixes 1 2/3 cups of water with 1/4 cup orange ju
bekas [8.4K]

Answer:

Priya needs 13⅓ cups of orange juice

Diego 15 cups

Step-by-step explanation:

......................................................................................................................

Priya

......................................................................................................................

Cup of water = 2½

Cup of orange = ⅓

If 2½ cups of water requires ½ cup of orange juice concentrate

Then 100 cups of water would require x cup of orange

Representing the above statement mathematically

2½ : ⅓ = 100 : x

5/2 : 1/3 = 100 : x ------------------Convert ratio sign to division

5/2 ÷⅓ = 100/x

5/2 * 3 = 100/x

15/2 = 100/x ---------------Multiply both sides by x

15/2 * x = 100/x * x

15x/2 = 100 ------------------ Multiply both sides by 2

2 * 15x/2 = 2 * 100

15x = 200 --------------- Divide both sides by 15

x = 200/15

x = 13⅓

So, 13⅓ cups of orange is needed by Priya

......................................................................................................................

Diego

......................................................................................................................

Cup of water = 1⅔

Cup of orange = ¼

If 1⅔ cups of water requires ¼ cup of orange juice concentrate

Then 100 cups of water would require x cup of orange

Representing the above statement mathematically

1⅔:¼ = 100:x

5/3 : ¼ = 100:x

5/3 ÷¼ = 100 ÷ x

5/3 * 4/1 = 100 ÷ x

20/3 =100/x----------------------- Multiply x to both sides

20/3 * x = 100/x * x

20x/3 = 100 ------------------------ Multiply 3 to sides by 3

3 * 20x/3 = 100 * 3

20x = 300 ------------- Divide both sides by 2

20x/20 = 300/20

x = 15

So, 15 cups of orange is needed by Diego

4 0
3 years ago
How do you determine the number of zeros to annex in the product of 0.002 and 0.003?
tatyana61 [14]
Okay so, 0.005,..................
6 0
3 years ago
Need help with is math​
Mumz [18]

Answer:

Step-by-step explanation:

I think that the answer is 74 and the fraction is 1/1348

8 0
3 years ago
The ratio of boys to girls in a class is 5:4. There are 36 students in the class. How many
Law Incorporation [45]

Answer:

16 students are girls.

Step-by-step explanation:

5:4=36

5x+4x=36

9x=36

x=4.

So we can multiply the ratio by 4.

4(5+4)

20+16.

Since girls is 4, there are 16 girls.

Hope this helps plz hit the crown :D

6 0
3 years ago
Read 2 more answers
Representing Proportional Relationships with Equations
Nata [24]

Answer:

a. 0.9

b. y=0.9x, where y is the cost and x is the amount of songs.

c. She should use the package price from the online music vendor (the first option)

Step-by-step explanation:

a.

The constant of proportionality is k in y=kx. Take a point form the graph ( lets say (5,4.5) ) and sub it in:

y=kx

4.5=5k

k=0.9

b.

The equation of a line is y=kx when it passes though the origin (which this one does). We know the value of k, so our equation is y=0.9x, where y is the cost and x is the amount of songs.

c.

Susan downloads 60 songs monthly. We're being asked if it would be cheaper to use the service where you play $58 total, or $0.90 per song. So for the package price, let's figure out the total cost (y) for 60 songs (x=60):

y=0.9x

y=0.9(60)=$54

So it would be cheaper to use the package price from the online music vendor.

3 0
3 years ago
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