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Tasya [4]
3 years ago
6

In how many ways can a teacher arrange 6 students in the front row of a classroom with a total of 20 students?

Mathematics
1 answer:
Vikki [24]3 years ago
8 0
This is a combination of 20 studants, 6 to 6:

C_{2,6}=\frac{20!}{(20-6)!6!}=\frac{20!}{14!6!}=\frac{20.19.18.17.16.15.14!}{14!.6.5.4.3.2.1}=38,760 \ ways
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dalvyx [7]

7.8335 is a number between 7.833 and 8.834

3 0
3 years ago
Read 2 more answers
Which of the following are exact numbers?
Mademuasel [1]

Answer:

Explanation with the help of discrete variables and continuous variables.

Step-by-step explanation:

We have to tell that which of the following can be an exact number.

This can be done with the approach of discrete and continuous variables.

Discrete variables are the variables that are countable and cannot be expressed in decimal form. They are point estimated.

Continuous variable are the variable that are estimated with the help of an interval. Their values can be expressed with the help of a decimal expansion. They are not countable.

a) Mass of a paper clip, Surface are of dime, Inches in a mile, Ounces in pound, microseconds in a week

Since all mass, area, weight(ounces), time, length(inches) are continuous variable, they can be estimated with the help of an interval. Thus, they can have exact number but not always.

b) Number of pages in a worksheet

Since this is a discrete quantity and it is countable. Thus, it will always have a point estimation and are exact numbers always.

4 0
3 years ago
Evan drew 8 pictures. Alexa drew p fewer pictures than Evan. Write an expression that shows how many pictures Alexa drew.
zhenek [66]

Answer:

8 - p

Step-by-step explanation:

X is p fewer than Y … X = Y - P

3 0
2 years ago
2/3j=8 HURRY UP I HAVE A QUIZ
ycow [4]

Answer:

J=12

Step-by-step explanation:

(2/3)*j = 8 // - 8

(2/3)*j-8 = 0

2/3*j-8 = 0 // + 8

2/3*j = 8 // : 2/3

j = 8/2/3

j = 12

5 0
3 years ago
Samantha can complete her homework in 3/5 of an hour her brother can complete it in 5/6 of that time what part of an hour does i
s2008m [1.1K]
I think it takes her brother 30 minutes to complete his homework.

Because 3/5 of an hour is 36/60

5/6 = 30/36

Hope this helps! :)
4 0
3 years ago
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