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
Diano4ka-milaya [45]
2 years ago
15

How many subsets of five elements each can be made from a set of seven elements?

Mathematics
1 answer:
Alina [70]2 years ago
8 0
<span>When creating a subset of 5 elements from 7 elements, order should not matter. Therefore, we use the combination formula over the permutation formula. The combination formula given n elements total and r elements used is n! / [r!*(n-r)!]. Substituting 7 for n and 5 for r, we get: 7! / (5!*2!) = 7*6 / 2 = 21 21 subsets can be created</span>
You might be interested in
Please help
larisa [96]

Step-by-step explanation:

1/3,0,9

9,3,27

1/9,3,27

3 0
2 years ago
Consider the population regression of log earnings [Yᵢ, where Yᵢ= ln(Earningsᵢ)] against two binary variables:
puteri [66]

Answer:

A) allows the population effect on log earnings of being married to depend on gender

Step-by-step explanation:

The regression equation of a dependent variable based on two or more independent variables is of the form:

Y=b_{0}+b_{1}X_{1} +b_{2}X_{2}+b_{3}X_{1}X_{2}

Here,

<em>Y</em> = dependent variable

X_{1} and X_{2} = independent variables

X_{1}X_{2} = interaction term

b_{1},\ b_{2}\ and \ b_{3} = regression coefficients.

If there is a significant interaction effect present then this implies that the effect of one independent variable (X_{1} orX_{2} ) on the dependent variable (<em>Y</em>) differs every time with different value of the other independent variable  (X_{1} orX_{2} ) .

The provided regression equation is:

Y_{i}=\beta _{0}+\beta _{1}D_{1i}+\beta_{2}D_{2i}+\beta _{3}D_{1i}D_{2i}+u_{i}

Y_{i} = dependent variable

D_{1i} and D_{2i} = independent variables

In this case the interaction term is defined as follows:

The effect of being married on log earnings is dependent on different values of the variables D_{2i}, i.e. the gender of the i^{th}person.

Thus, the correct option is (A).

3 0
3 years ago
Helpppppp me please
nataly862011 [7]

Answer:Sure thing? But first what do you need help with and maybe just maybe I will help you with whatever you need help with?

Step-by-step explanation:

7 0
2 years ago
PLEASE HELP!!!!
Artyom0805 [142]

Answer:

The total cost of producing 6 widgets is $231.

Step-by-step explanation:

5 0
2 years ago
Help i need answer right now...
zimovet [89]
That one looks very difficuly
7 0
3 years ago
Other questions:
  • Please Help Me How to do this..
    14·1 answer
  • Ignore the top just answer both of the questions at the bottom plz
    5·2 answers
  • Carl runs a distance of 1.17 miles in 9 minutes at that rate how far does Carl run in one minute?
    8·1 answer
  • Plsssss helppp im so lost on this
    11·1 answer
  • Find the surface area of the part of the paraboloid z=5-3x^2-2y^2 located above the xy plane. (10 points) z
    15·1 answer
  • (I have two questions)
    9·2 answers
  • Put 2 1/4 : 6 3/4 into a unit rate PLEASE NOWWWWWWWWW
    6·1 answer
  • Please, it’s due tonight and I suck at proofs:((
    12·2 answers
  • Easy 10 points<br><br>10*2=​
    7·2 answers
  • Somebody pls help me with this question pls
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!