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
ale4655 [162]
3 years ago
6

Thomas has a bag with 7 green marbles, 5 blue marbles, and 4 red marbles. For each part below, if the marble selected is replace

d before the next marble is drawn, find the probability for the given draw. Write your answer as a fraction, as a decimal, and as a percent.
A red marble?
A red or a green marble?
An orange marble?
Mathematics
1 answer:
Gwar [14]3 years ago
7 0
7 + 5 + 4 = 16, so probability of getting a red is 4 out of 16 which can be simplified as 1 in 4 chances
You might be interested in
The perimeter around the gym is 2718 feet. What is the perimeter in yards? <br> yards
vivado [14]

Answer:

906

Step-by-step explanation:

7 0
3 years ago
I have 10 goats, n of which are male. I need to choose 2 of them to make a casserole.
snow_tiger [21]

Answer: There are 4 male goats.

Step-by-step explanation:

We know that n of the 10 goats are male.

The probability that in a random selection, the selected goat is a male, is equal to the quotient between the number of male goats (n) and the total number of goats (10)

The probability is;

p = n/10

Now the total number of goats is 9, and the number of male goats is n -1

then the probability of selecting a male goat again is:

q = (n-1)/9

The joint probability (the probability that the two selected goats are male) is equal to the product of the individual probabilities, this is

P = p*q = (n/10)*((n-1)/9)

And we know that this probability is equal to 2/15

Then we have:

(n/10)*((n-1)/9) = 2/15

(n*(n-1))/90 = 2/15

n*(n-1) = 90*2/15 = 12

n^2 - n = 12

n^2 - n - 12  = 0

This is a quadratic equation, we can find the solutions if we use Bhaskara's formula:

For an equation:

a*x^2  + b*x + c =  0

The two solutions are given by:

x = \frac{-b +- \sqrt{b^2 - 4*a*c} }{2*a}

For our case, the solutions will be:

n = \frac{1 +- \sqrt{(-1)^2 - 4*1*(-12)} }{2*1 } = \frac{1+- 7}{2}

The two solutions are:

n = (1 - 7)/2 = -3    (this solution does not make sense, we can not have a negative number of goats)

The other solution is:

n = (1 + 7)/2 = 4

This solution does make sense, this means that we have 4 male goats.

5 0
3 years ago
Which expressions are equivalent to the given expression?
ale4655 [162]

Answer:

(a). and (b).

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
Henry is working on a division problem. Which decimal point is in the correct place for Henry’s result?
Dominik [7]
It would be answer 4 because 14.85 divided by .05 is 297


7 0
3 years ago
On Tuesday, a radio store reduces all its Monday prices by 20%. On Wednesday, by what percent
Zepler [3.9K]

Answer:

Sbehevsb

Step-by-step explanation:

4 0
3 years ago
Other questions:
  • Prove: For all sets AB,and CIA-B) U (A n B) = A
    7·1 answer
  • Divide.
    15·1 answer
  • If there are 3 boys for every 4 girls in the choir, how many boys are there if there are 42 students?
    7·1 answer
  • Whats the exact area of a circle with a radius of 13 feet​
    8·1 answer
  • Marco pays 200$ each month to rent a car where she earns 20$ an hour driving for uber. Which
    7·2 answers
  • A triangle has an area of 32 square millimeters and a base of 8 millimeters.<br> What is its height?
    12·1 answer
  • √448<br><img src="https://tex.z-dn.net/?f=%20%5Csqrt%7B488%7D%20" id="TexFormula1" title=" \sqrt{488} " alt=" \sqrt{488} " align
    6·1 answer
  • 11) Krystal and Rob each improved their yards by planting hostas and ivy. They bought their
    12·1 answer
  • A plane is 24,000 feet above sea
    9·2 answers
  • Two cards are drawn from a pack of 52 cards one by one without replacement; that is, the first card is not replaced before the s
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!