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
serg [7]
3 years ago
7

There are 3 white marbles and 7 blue marbles in a bag. Jamie will randomly pick two marbles out of the bag without replacing the

first one. What is the probability of Jamie picking a white marble and then a blue marble?
Mathematics
1 answer:
Stolb23 [73]3 years ago
8 0
We know the number of all ways to take one marble and then take another marble is: 10x9=90
The first time, Jamie wants to pick a white and the ways is: 3
Now we have only 9 marble with 2 white and 7 blues, she has 7 ways to take a blue . So, she has 3x7=21 ways to take what she wants.
And we do the division 21:90=7/30. and that is the answer
You might be interested in
Can anyone explain those marked steps in case (iii)
Tema [17]
\cos\dfrac{3x}2=\cos\left(\dfrac\pi2+\dfrac x2\right)
\implies \dfrac{3x}2=2n\pi+\dfrac\pi2+\dfrac x2

follows from the fact that the cosine function is 2\pi-periodic, which means \cos x=\cos(2\pi+x). Roughly speaking, this is the same as saying that a point on a circle is the same as the point you get by completing a full revolution around the circle (i.e. add 2\pi to the original point's angle with respect to the horizontal axis).

If you make another complete revolution (so we're effectively adding 4\pi) we get the same result: \cos x=\cos(4\pi+x). This is true for any number of complete revolutions, so that this pattern holds for any even multiple of \pi added to the argument. Therefore \cos x=\cos(2n\pi+x) for any integer n.

Next, because \cos(-x)=\cos x, it follows that \cos x=\cos(2n\pi-x) is also true for any integer n. So we have

\implies \dfrac{3x}2=2n\pi\pm\left(\dfrac\pi2+\dfrac x2\right)

The rest follows from considering either case and solving for x.
5 0
2 years ago
Consider a point, N, located at (6, 8). Name the
Fofino [41]
Answer: (6,16)
(6,2)
(-2,8)
(14,8)
5 0
3 years ago
Which expression is equivalent to 4(m+5)?
Taya2010 [7]
The answer is b 4m+20
4 0
3 years ago
Read 2 more answers
Eric works in landscaping. He charges a fee of $25 plus $15 per hour. What is the least number of hours he must work in order to
nlexa [21]

Answer:

5 hours

Step-by-step explanation:

you would so 100 minus 25 (25 is just one charge fee) which is 75 then divide 75 into 15 which is the hourly pay, and get 5 which is the hours he must work

3 0
3 years ago
11 + 2(z + 3) -z simplified
lbvjy [14]

Answer: z + 17

Step-by-step explanation:

1) DISTRIBUTE:

11 + 2z + 6 - z

2) COMBINE LIKE TERMS

z + 17

3 0
2 years ago
Read 2 more answers
Other questions:
  • A party store uses 20% of a tank of helium a day and fills 80 balloons. Each balloon takes 0.5 cubic feet of helium to fill. How
    7·2 answers
  • Factor the expression below 36a^2-25b^2
    7·2 answers
  • What is the solution of |9x - 36| = 9
    6·1 answer
  • Question 14(Multiple Choice Worth 4 points)
    11·1 answer
  • A rectangular sheet of paper had a width of 841 millimetres.
    11·1 answer
  • :))))) Select the answer that correctly orders the set of numbers from greatest to least.
    7·1 answer
  • Each square below represents one whole​
    7·2 answers
  • 1.1.3 what is the the perimeter of a swimming pool if the length is 4,5m and the breadth is 3m? 1.1.4 Define the following conce
    14·1 answer
  • Find the value of x.<br> А A<br> 54°<br> 2
    8·1 answer
  • The radius of a circle is 2 inches. What is the area of a sector bounded by a 90° arc?
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!