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
mars1129 [50]
2 years ago
15

At a peace summit, seven Hatfield and nine McCoy family

Mathematics
1 answer:
katrin2010 [14]2 years ago
3 0

Answer:

0.525 = 52.5% probability that the two are from different families.

Step-by-step explanation:

A probability is the number of desired outcomes divided by the number of total outcomes.

In this problem, the order in which the two participants are selected is not important, so we use the combinations formula to solve this question.

Combinations formula:

C_{n,x} is the number of different combinations of x objects from a set of n elements, given by the following formula.

C_{n,x} = \frac{n!}{x!(n-x)!}

Desired outcomes:

1 from the Harfield family(from a set of 7).

1 from the McCoy family(from a set of 9). So

D = C_{7,1}*C_{9,1} = \frac{7!}{1!6!}*\frac{9!}{1!8!} = 7*9 = 63

Total outcomes:

2 from a set of 16. So

T = C_{16,2} = \frac{16!}{2!14!} = 120

Probability:

p = \frac{D}{T} = \frac{63}{120} = 0.525

0.525 = 52.5% probability that the two are from different families.

You might be interested in
The contrapositive of p q is:
Kay [80]
Some symbols are missing. I'm assuming you meant to put in a horseshoe symbol like so p \supset q

If so, then the contrapositive of that would be \sim q \supset \ \sim p which is the final answer. 

The tilde sign \sim means "not" so writing \sim q means "not q" which is the complete opposite of q. 
6 0
3 years ago
If p is a polynomial show that lim x→ap(x)=p(a
Lostsunrise [7]

Let p(x) be a polynomial, and suppose that a is any real number. Prove that

lim x→a p(x) = p(a) .

 

Solution. Notice that

 

2(−1)4 − 3(−1)3 − 4(−1)2 − (−1) − 1 = 1 .

 

So x − (−1) must divide 2x^4 − 3x^3 − 4x^2 − x − 2. Do polynomial long division to get 2x^4 − 3x^3 − 4x^2 – x – 2 / (x − (−1)) = 2x^3 − 5x^2 + x – 2.

 

Let ε > 0. Set δ = min{ ε/40 , 1}. Let x be a real number such that 0 < |x−(−1)| < δ. Then |x + 1| < ε/40 . Also, |x + 1| < 1, so −2 < x < 0. In particular |x| < 2. So

 

|2x^3 − 5x^2 + x − 2| ≤ |2x^3 | + | − 5x^2 | + |x| + | − 2|

= 2|x|^3 + 5|x|^2 + |x| + 2

< 2(2)^3 + 5(2)^2 + (2) + 2

= 40

 

Thus, |2x^4 − 3x^3 − 4x^2 − x − 2| = |x + 1| · |2x^3 − 5x^2 + x − 2| < ε/40 · 40 = ε.

3 0
3 years ago
What is the slope of the line that passes through the points(−8,2) and (-11, 3)? Write your answer in simplest form.
Fiesta28 [93]

Answer: -1/3

Step-by-step explanation:

The formula is y2 - y1/ x2 - x1 . So the answer would be -1/3 bc 3 - 2 = 1 and -11 - (-8) = -3.

7 0
1 year ago
Read 2 more answers
Please help and thank you.
Paladinen [302]

Because the ratio of acceptance is 9:100, we simply multiply both by 2:

9:100 = 18:100

The chances of her admitting the 18th student is Option B., 100%

3 0
2 years ago
The perimeter of a rectangular garden is 126 feet. The length of the garden is twice the width. Find the length and width of the
snow_tiger [21]

Answer:

2w+6

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
Other questions:
  • 9. Given A = {1, 2, 3, 4, 5, 6, 7, 8, 9} and B = {2, 4, 6, 8}, what is A∪B?
    8·2 answers
  • Please answer the question from the attachment.
    12·1 answer
  • I don't get it. do i start inside the parentheses?
    5·1 answer
  • A picture on a page was reduced by 60% of its original size, and this copy was then reduced by 20%. What percent of the size of
    7·1 answer
  • Need help 2m+3 /2-17/4 &lt;m+2/8
    10·1 answer
  • Reduce the fraction 20/24
    10·2 answers
  • HELP PLEASE WHICH ONE IS CORRECT?
    9·1 answer
  • Sally's income per month is $1500. She wants to create a budget to be able to afford everything. How much can she spend on "fun"
    11·1 answer
  • What is the standard deviation of the data set {6,8,6,11,8,8,9}?
    7·1 answer
  • A bag of potatoes weighs about
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!