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
Phoenix [80]
3 years ago
7

BRAINLIEST ANSWER AND 98 POINTS!!!!

Mathematics
1 answer:
Alex73 [517]3 years ago
3 0

Answer:

P (g1, g2) = P(g1) * P(g2) = 1/2 * 1/2 = 1/4

P (r1, r2) = P(r1) * P(r2) = 1/5 * 1/5 = 1/25

P ( b1, g1 or g1 b2) = 3/20 + 3/20  = 6/20 = 3/10

P ( b1, g1 or g1 b2) = 1/10 + 1/10  = 2/10 = 1/5

Step-by-step explanation:

How many marbles are there?

5 green, 3 black, and 2 red marbles = 10 marbles

P ( green marbles) = green/ total = 5/10 = 1/2

Then she puts it back, so there are still 10 marbles

P (2nd marble is green) = green/ total = 5/10 = 1/2

These are independent events ( since the marble is replaced)

P (g1, g2) = P(g1) * P(g2) = 1/2 * 1/2 = 1/4


P ( red marble) = red/ total = 2/10 = 1/5

Then she puts it back, so there are still 10 marbles

P (2nd marble is red) = red/ total = 2/10 = 1/5

These are independent events ( since the marble is replaced)

P (r1, r2) = P(r1) * P(r2) = 1/5 * 1/5 = 1/25


P ( black marble) = black/ total = 3/10

Then she puts it back, so there are still 10 marbles

P (2nd marble is green) = green/ total = 5/10 = 1/2

These are independent events ( since the marble is replaced)

P (b1, g2) = P(b1) * P(g2) = 3/10 * 1/2 = 3/20

This is if order matters, but I will assume order does not matter since the key word then is not there it just says and

If order doesn't matter, just that she has a black and green marble

The we multiply it by 2  because

P (b2, g1) = P(b2) * P(g1) = 1/2 * 3/10 = 3/20

We add the probabilities when it is or

P ( b1, g1 or g1 b2) = 3/20 + 3/20  = 6/20 = 3/10


P ( green marble) = green/ total = 5/10=1/2

Then she puts it back, so there are still 10 marbles

P (2nd marble is red) = red/ total = 2/10 = 1/5

These are independent events ( since the marble is replaced)

P (g1, r2) = P(g1) * P(r2) = 1/2 * 1/5 = 1/10

This is if order matters but I will assume order does not matter since the key word then is not there it just says and

If order doesn't matter, just that she has a green and red marble

The we multiply it by 2  because

P (r1, g2) = P(r1) * P(g2) = 1/5 * 1/2 = 1/10

We add the probabilities when it is or

P ( b1, g1 or g1 b2) = 1/10 + 1/10  = 2/10 = 1/5

You might be interested in
Apply the distributive property to factor out the greatest common factor<br><br> 60m-40=
Tcecarenko [31]

Answer:

The greatest common factor is 20

Step-by-step explanation:

Rewrite 40 as 20*2

Rewrite 60 as 20*3

=20*3m-20*2

Factor out common term 20;

20(3m-2)

7 0
2 years ago
A) 3a + 5 (2a + 6) - 7a
Mrac [35]

Answer:

A) 3a+10a+30-7a

=6a+30

B) 6b-32b+72+3b

=72+23b

3 0
2 years ago
What is the area of a semicircle with diameter 8 cm?
garik1379 [7]

Answer:

We'll use 3.14 as an approximation of pi. So, now we plug the values into the equation. A = 3.14 * 8^2/2.

5 0
2 years ago
Does anybody know the answers to these? will mark brainliest!
jeyben [28]

Answer:

1.

Tan 45=√2/n

n=√2

again

sin 45=√2/m

m=2

answer:<u> </u><u>m</u><u>=</u><u>2</u><u>,</u><u>n</u><u>=</u><u>√</u><u>2</u>

<u>2</u><u>.</u>

sin 45=x/3

x=3/√2=3√2/2

y=3√2/2

<u>a</u><u>n</u><u>s</u><u>:</u><u>x</u><u>=</u><u>3√2/2</u><u>,</u><u>y</u><u>=</u><u>3√2/</u><u>3</u>

<u>3</u><u>.</u>

sin 45=a/4

a=4/√2

b=4/√2

ans:<u>a</u><u>=</u><u>4</u><u>/</u><u>√</u><u>2</u><u>,</u><u>b</u><u>=</u><u>4</u><u>/</u><u>√</u><u>2</u>

4.

b=4 base sides of isosceles triangle

sin 45=4/a

a=4√2

ans:<u>a</u><u>=</u><u>4</u><u>√</u><u>2</u><u> </u><u>and</u><u> </u><u>b</u><u>=</u><u>4</u>

5 0
3 years ago
If EG=50 , and point F is 2/5 of the way between e and g,find the value FG A.30 B.25 C.40 D.20
noname [10]

Answer:

b is the ans

Step-by-step explanation:

6 0
2 years ago
Other questions:
  • A washer and a dryer cost $829 combined. The washer costs $71 less than the dryer. What is the cost of the dryer?
    14·1 answer
  • A box contains 10 items, of which 3 are defective and 7are non defective. Two items are randomly selected, one at a time, with r
    10·1 answer
  • Which expression is equivalent to 2/3x - 1/2y - 4/5
    10·2 answers
  • liz earns $9.28 per hour at her part time job. she works 5.5 hours saturday. how much money dose liz earn
    8·2 answers
  • A fruit stand has 18 red apples. This is 40% of the total apples in the stand. How many apples are there in the stand?
    7·1 answer
  • What is the distance between (-6, 4) and (-8, 6) ​
    10·2 answers
  • Evaluate the expression when m= 2. m2 - 8m -3​
    10·2 answers
  • Which expression has a value of 3
    7·2 answers
  • (5•-3)^2 - (2•5 - 3•-3)^3
    14·2 answers
  • Solve the following​
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!