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
Dimas [21]
3 years ago
15

Suppose I have an urn full of balls.10 balls are balck, 2 are blue,2 are red,1 is green. I reach into the urn and pull out a bal

l and record the colour. I then put it back in the urn. If i do this 10 times calculate
a) the probability I obtain exact 4 black balls
b) The probablility I obtain less than 2 red balls

For clarity we are putting the balls back into the urn after the colour is recorded.
Mathematics
1 answer:
Gelneren [198K]3 years ago
6 0

Answer:

Step-by-step explanation:

Assuming that each draw is independent of the last and that each ball is equally likely to be selected makes this a binomial distribution

a.) first find the probability of selecting a black ball, 2/10 or .2

{10\choose{4}}.2^4*.8^6=.08808384

b.) Probability of slecting a red ball: 1/10 or .1

Less than 2 is X=0 + X=1

{10\choose0}*.2^0*.8^{10}+{10\choose1}*.2*.8^9=.3758096384

i will leave you to do the rounding

You might be interested in
A student solved a quadratic equation as shown here:
djverab [1.8K]

Answer:

x = 3/2 or x = -4

Step-by-step explanation:

The identifiable error the students have is that before the left hand side of the equation is factorized, the right hand side value of 12 ought to be brought to the left hand side, leaving a net value of zero on the right hand side. Then whatever is factored  on the left hand side is then equated to zero and then we can find the two values of x after setting each of the individual factors to zero

We proceed as follows;

2x^{2} + 5x = 12\\2x^{2} + 5x - 12 = 0\\2x^{2} + 8x -3x -12 = 0\\2x(x+4) -3(x+4) = 0\\(2x-3)(x+4) = 0\\2x-3 = 0 or x+4 =0\\2x=3 or x=-4\\x = 3/2 or x= -4\\x = 1.5 or- 4

6 0
3 years ago
How much is 1 foot line of quarters worth
Alborosie

a quarter is 1.75 mm thick

1 mm = 0.0393701 inches

0.0393701/12 = 25.4 mm per inch

25.4/1.75 = 14.5 quarters per inch

14.5 x 12 = 174 quarters per foot

174 x 0.25 = 43.50

$43.50 for a foot of quarters


5 0
3 years ago
Which one doesn't belong?<br> Graph
suter [353]

Where is the graph I need to see the graph for the answer

6 0
3 years ago
Which will help you when you file a claim for home insurance?
tester [92]

Answer:

C. Home inventory

Step-by-step explanation:

8 0
2 years ago
How many times can 7 go into 6437?
asambeis [7]
About 9-10 times(when you divide you get a decimal)

3 0
3 years ago
Other questions:
  • What are the coordinates of the endpoints of segment m’n’
    9·2 answers
  • HELP WILL GIVE BRAINLIEST QUICK!
    5·2 answers
  • Draw a square and shade about 1/8 of it. How did you decide how much to shade?
    14·3 answers
  • Good day! Please help me in this difficult problem and I will be very grateful if you can explain this to me :D
    5·2 answers
  • Is 1/4(8y-12) equivalent to 2y-12 explain why or why not
    12·1 answer
  • Evaluate the surface integraliintegral.gifSF � dSfor the given vector field F and the oriented surface S. In other words, find t
    9·1 answer
  • Anyone know this plzzz ill give brainly :)
    5·2 answers
  • Find the least number which must be subtracted from each of the following numbers
    9·1 answer
  • HOW DO YOU DO THIS QUESTION???
    6·1 answer
  • Probability Math Question
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!