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sveticcg [70]
3 years ago
6

A bag contains three red marbles and two blue marbles. Marcus reaches in and pulls out a marble, does not replace it, but then r

eaches in and pulls out another marble. What is the probability now that they both are blue?
Mathematics
1 answer:
Scrat [10]3 years ago
8 0
P(b+b) = p(2/5 x 1/4) = 2/20 = 1/10
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HELP THIS IS DUE AT 12
kap26 [50]

Answer:

16

Step-by-step explanation:

4×.75=3

8×.75=6

16×.75=12

20×.75=15

7 0
2 years ago
Read 2 more answers
Two bags contained 50 kilograms of sugar each. After 3 times as much sugar was taken from the first bag than from the second bag
erma4kov [3.2K]
20 kg remaining in bag 1.
40 kg remaining in bag 2.
8 0
3 years ago
The original price is $60.The sales price is $45. What is the percent of discount?
MariettaO [177]
Hey there!

To start, first subtract 45 from 60 to find the amount of money taken off from the discount:
60-45
=15

Because 15 dollars have been taken off the original price, you can find the percent of discount by setting up this proportion where x represents the percent of discount:
15/60=x/100

Now, cross multiply and solve for x:
1500=60x
x=25

Therefore, your discount would be 25%.

Hope this helps and have a marvelous day! :)
5 0
3 years ago
At Hogwarts School of Witchcraft and Wizardry, Professor Snape was concerned about grade inflation, and suggested that the schoo
ExtremeBDS [4]

Answers:

The z scores are approximately:

  • Care of Magical Creatures:  z = 0.333
  • Defense Against the Dark Arts:  z = 0.583
  • Transfiguration:  z = -0.263
  • Potions: z = -0.533

From those scores, we can say:

  • Best grade = Defense Against the Dark Arts
  • Worst grade = Potions

=====================================================

Further Explanation:

We'll need to convert each given score to a corresponding standardized z score.

The formula to use is

z = (x - mu)/sigma

where,

  • x = given grade for each class
  • mu = mean
  • sigma = standard deviation

Let's find the z score for the Care of Magical Creatures class

z = (x - mu)/sigma

z = (3.80 - 3.75)/(0.15)

z = 0.333 approximately

Repeat this process for the Defense Against the Dark Arts score.

z = (x - mu)/sigma

z = (3.60 - 3.25)/(0.60)

z = 0.583 approximately

And for the Transfiguration class as well

z = (x - mu)/sigma

z = (3.10 - 3.20)/(0.38)

z = -0.263 approximately

The negative z score means his grade below the average, whereas earlier the other scores were above the average since he got positive z scores.

Now do the final class (Potions) to get this z score

z = (x - mu)/sigma

z = (2.50 - 2.90)/(0.75)

z = -0.533 approximately

This grade is below average as well.

----------------------------

To summarize, we have these z scores

  • Care of Magical Creatures:  z = 0.333
  • Defense Against the Dark Arts:  z = 0.583
  • Transfiguration:  z = -0.263
  • Potions: z = -0.533

Harry did his best in Defense Against the Dark Arts because the z score of 0.583 (approximate) is the largest of the four z scores. On the other hand, his worst grade is in Potions because -0.533 is the lowest z score.

3 0
1 year ago
Which function rule describes the number of centimeters y as a function of a number of millimeters x?
ira [324]
Y= 10x
y: number of cm
x: number of mm
7 0
3 years ago
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