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Serga [27]
2 years ago
5

Help me pls pls pls i really need help

Mathematics
1 answer:
Monica [59]2 years ago
8 0
The answer is A..... 2 2/3
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Out of 10 students, 2 will be chosen to ride in a car instead of a van on an upcoming field trip. Which statement best describes
Rudiy27

Answer:

D

Step-by-step explanation:

Firstly, since it is a selection question, we shall be using a combination approach.

So here we are trying to select the best answer that describes that 2 out of 10 students are selected.

Let’s consider the scenario below;

selecting r out of n can be resolved using the combination nCr

= n!/(n-r)!r!

Now in this case, our n = 10 and r = 2.

Thus, 10C2, we have ;

10!/(10-2)!2! = 10!/8!2! = (10 * 9 * 8!)/8!2! = (10 *9)/2! = 90/2 = 45

Thus, 10C2 = 45

Here, the order of selection does not matter as we can select in random fashion. This makes option D correct

8 0
3 years ago
Solve 7 + x - 15 = -2 2/3 Please help!!! show your work please!
Margaret [11]
Firstly let’s make the -2 2/3 easier

-2*2/3= -4/3

Then we will move all the numbers to one side and keep the x on the other side. Remember when u move a negative from one side of the equal sign it changes to positive and if u move a positive it changes to a negative.

X= -4/3+15-7
=-4/3+8
=-4/3+24/3 (To add fractions the denominator has to be the same, and 24/3 is the same as 8)

X=20/3

Hopefully this helps
3 0
3 years ago
The relationship between two variables partialling out the effect that a third variable has on one of those variables can be exp
TiliK225 [7]

Answer: partial correlation.

Explanation:

partial correlation measures the degree of association between two random variables, with the effect of a set of controlling random variables removed. If we are interested in finding to what extent there is a numerical relationship between two variables of interest, using their correlation coefficient will give misleading results if there is another, confounding, variable that is numerically related to both variables of interest. This misleading information can be avoided by controlling for the confounding variable, which is done by computing the partial correlation coefficient.

3 0
3 years ago
14 1/2 - 2 1/3 what is the answer to this equation?
olchik [2.2K]

Answer:

12 1/6

It wants me to add more but there's nothing to add

7 0
2 years ago
⅒ (to decimal)<br><br>A. 0.1<br>B. 0.53<br>C. 0.10​
nydimaria [60]
⅒ (to decimal)

A. 0.1
7 0
2 years ago
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