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
Anna [14]
4 years ago
7

In Evans history class, 10 out of 100 key terms will be randomly selected to appear on the final exam; Evan must then choose 7 o

f those 10 to define. Since he knows the format of the exam in advance, Evan is trying to decide how many key terms he should study. (a) Suppose that Evan decides to study s key terms, where s is an integer between 0 and 100. Let X be the number of key terms appearing on the exam that he has studied. What is the distribution of X? Give the name and parameters, in terms of s. (b) Calculate the probability that Evan knows at least 7 of the 10 key terms that appear on the exam, assuming that he studies s = 75 key term
Mathematics
1 answer:
motikmotik4 years ago
6 0

Answer:

(a) Hypergeometric distribution

(b) 0.785384...

Step-by-step explanation:

(a) looking at the question, we see that X = \in \{0, ... , 10 \}, suppose Evans studied s key terms, this implies that he has not studied 100 - s key terms. Suppose k = \in \{0, ... , 10 \} if X = k, then k out of the s key terms he had studied appeared. But 10 - k out of 100 - s key terms he hasn't studied appeared. Thus X is an Hypergeometric distribution, X~HGeom(s, 100 - s, 10) with PMF:

P_{x}(k) = P(X = k)

You might be interested in
A scatter plot with a line is shown below. (Attachment)
galben [10]

Answer:

It can be the line of best fit because it is closest to most of the data points.

8 0
3 years ago
One of the solutions to x2 − 2x − 15 = 0 is x = −3. What is the other solution?
Bond [772]

Answer:x=5

Step-by-step explanation: x^2−2x−15=0

(x−5)=0                                                                                                                        x−5=0                                                                                                                           x=5

6 0
3 years ago
Using 2, 3, 5, 8, only one time , what makes 104
I am Lyosha [343]
8(5.2+3)=8(15+3)=8·13=104.
5 0
4 years ago
Which of the following represents the range of the function g(x)=5(x-2)^2-7
anygoal [31]

Answer:I’m doing this too

Step-by-step explanation:

6 0
3 years ago
Principal, $3000; Annual interest rate, 5.7%, 5 years
Natali [406]

Answer:

$3,958.19

Step-by-step explanation:

You are going to want to use the compound interest formula, which is shown below.

P(1+\frac{r}{n} )^{nt}

<em>P = initial balance </em>

<em>r = interest rate </em>

<em>n = number of times compounded annually </em>

<em>t = time </em>

Lets plug in the values into the equation:

3,000(1+\frac{0.057}{1})^5 = 3,958.19

Your final answer is $3,958.19

3 0
3 years ago
Other questions:
  • I WILL MARK BRAINIEST!!!
    12·1 answer
  • If 4x - 10 = -30, find the value of 3 - x
    9·2 answers
  • Where do the parentheses go in the problem 6+9÷3+6-4×2 ;29
    5·1 answer
  • What is the coefficient in the expression 10x2-7?
    14·2 answers
  • What's the formula to perimeter
    14·2 answers
  • How do you solve algebra
    9·2 answers
  • The side lengths are 9,12,18. is this a right triangle?
    13·1 answer
  • What is the fourth term of the sequence defined by the recursive formula t1 = 4, t2 = 6 tn= tn-1 + tn-2
    9·1 answer
  • I need to know how to solve for question number 4 please?
    11·1 answer
  • ALGEBRA On the first Tuesday of every month, Roth's gives seniors a 15%
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!