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
lukranit [14]
1 year ago
9

A bag contains 4 blue marbles and 7 red marbles. Two marbles are randomly drawn without replacement. Find the probability of the

event ""the first marble is red and the second marble is blue""?
Mathematics
1 answer:
Kruka [31]1 year ago
3 0

Answer:

8/11

Step-by-step explanation:

In the given scenario was cannot calculate P(B) directly. As it depends on what happened first, by itself we don’t know what was drawn first. Thus it becomes a conditional probability question:

P( B | A ) ← reads as the probability of “B” happening “given that” “A” has already happened — in this case the probability that the second marble drawn is a blue marble given that the first was a red marble.

You might be interested in
Help me with 24,26,28, and 30 please.
Novay_Z [31]
24)
The number 1/10 can be expressed as a decimal by dividing the top number by the bottom.
1/10=0.1
0.8>0.1
0.8>1/10

26)
The number 3/5 can also be expressed as a decimal, using the method I described for 24.
3/5=0.6
0.6>0.35
3/5>0.35

28)
The number 2/5 can also be expressed as a decimal.
2/5=0.4
0.4>0.3
2/5>0.3

30)
The number 1/6 cannot be expressed as a decimal. So, express 0.2 as a fraction.
0.2=2/10=1/5
1/5=6/30
1/6=5/30
6/30>5/30
0.2>1/6

Hope this helps!
8 0
3 years ago
HELP ASAP<br> What is the measure of ZDBE?<br> A. 120°<br> B. 45°<br> C. 75°<br> D. 60°
kolezko [41]
B. 45 degrees is the answer
4 0
2 years ago
Read 2 more answers
Please help with this
slava [35]

Answer:

D) x=\frac{-2+-2\sqrt{7} }{3}

Step-by-step explanation:

The quadratic formula is : \frac{-b+-\sqrt{b^2-4ac} }{2a}

A in terms of this question=9

B in terms of the question is 12

C in terms of the question is -24.

This question is an example of a quadratic equation. To work this out you may first need a calculator. The first step is to substitute the values of a,b and c into the formula.  So once substituted the formula of \frac{-b+-\sqrt{b^2-4ac} }{2a} becomes \frac{(-12)+-\sqrt{(12)^2-4*(9)*(-24)} }{2(9)}. Although when written in a calculator there will not be a plus and minus button and so you would have to do this separately.

However when substituting the values it would be best practice to put them in brackets.

1) Substitute the values into the equation for +.

\frac{(-12)+\sqrt{(12)^2-4*(9)*(-24)} }{2(9)}=\frac{-2+2\sqrt{7} }{3} /1.097167541

2) Substitute the values into the equation for -.

\frac{(-12)-\sqrt{(12)^2-4*(9)*(-24)} }{2(9)}=\frac{-2+2\sqrt{7} }{3} /-2.430500874

8 0
3 years ago
The radius of the circle on a basketball court is 6 feet. What are the approximate circumference and area of the circle?
AlexFokin [52]
Circumference formula - 2pi(r)
area formula - pi(r)^2
in both of the formulas r is the radius so

to find circumstance: 2(pi)(6) = 25.68 feet

to find area: pi(6)^2 = 113.04 feet
4 0
2 years ago
I need help on this
sweet [91]
So basically you would take you your m which is 339 degrees greater than 3 so you would divide 339 by 3 and get 113 so your m= 113 degrees so for example the first question would be m<1 = 113 and so on so you would multiply 113 by the number it is greater than
6 0
3 years ago
Other questions:
  • Determine which pizza is the better buy in each situation. The 10-inch diameter pizza for $8.99 or the 6-inch diameter pizza for
    8·2 answers
  • I really need help pls.
    13·1 answer
  • Need help please!! i will mark brainliest to whoever answers correctly &lt;33
    7·1 answer
  • Moesha is (3g+1) years old and shanti is twice moesha age. find the sum of the ages of moesha and shanti in 2 years time.
    7·1 answer
  • Help me please it’s my last question ! PLEASE
    7·1 answer
  • Ms. Franco has 64 pencils and 48
    11·1 answer
  • Write 2.5896 * 10^-4 in standard form
    5·1 answer
  • Austin deposits $3000 into an account that pays simple interest at a rate of 4% per year. How much interest will he be paid in t
    5·1 answer
  • Is 3φ rational or irrational
    8·1 answer
  • HELP ME OUT PLEASE!!
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!