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a_sh-v [17]
3 years ago
5

Which is the least valid way to stimulate how many boys and girls are in a random sample of 20 students from a school that is ha

lf boys and half girls?
A. Flip a coin 20 times, assigning one out come to boys and the other to girls

B. Drop 20 coin at once and count the number of each outcome

C. Count how many boys and girls are in your mat class and use a proportion

D. Have a calculator generate 20 random integers and count the number of even and odd integers
Mathematics
2 answers:
slamgirl [31]3 years ago
8 0
I think the answer is C
tensa zangetsu [6.8K]3 years ago
5 0

Total number of Student in the School in which half are boys and Half are girls =20

Probability of an event

             =\frac{\text{Total favorable oucome}}{\text{Total Possible outcome}}                  

Probability of Number of Boys as well as Probability of Number of Girls

                               =\frac{10}{20}\\\\=\frac{1}{2}  

The Most appropriate option is

Option C

Count how many boys and girls are in your math class and use a proportion.

In Option A, B and D

The probability of each outcome that is Success and Failure will be nearly equal to 0.50 .

But in Option C, you can't say precisely that Probability will be equal to , 0.50 in each case , that is Success and Failure.

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Lamar is solving the equation x2−12x=−6 by completing the square. Which shows Lamar's next step and the solution to the equation
Levart [38]
Completing the square is a process to find the solutions, or the x-values, to a quadratic equation. This method can only work if it is in the format: x^2 + bx = c
In this equation, the b value is -12 and the c value is -6. The process for completing the square goes like this:

x^2 + bx + (b/2)^2 = c + (b/2)^2

Now let’s solve the equation above using this method.

Step 1: x^2 - 12x + (-12/2)^2 = -6 + (-12/2)^2

Step 2: x^2 - 12x + (-6)^2 = -6 + (-6)^2

Step 3: x^2 - 12x + 36 = -6 + 36

Step 4: x^2 - 12x + 36 = 30

Now, to factor it. After doing the process until now, the left side of the equation can ALWAYS be in the format: (x + a)^2

Step 5: x^2 - 12x + 36 can be factored in this format as (x - 6)^2

Step 6: (x - 6)^2 = 30

Step 7: x - 6 = √30

Step 8: x = 6 ±√30

4 0
2 years ago
-10p+9p=12 solve this for me please with work shown
ANTONII [103]

-10p +9p =12

combine like terms

p(-10+9) =12

-p =12

divide by -1

p = -12

8 0
3 years ago
Read 2 more answers
I need help on this problem can someone help<br><br> -8 (y - 86) = -48
exis [7]

Answer:

y=92

Step-by-step explanation:

Divided both sides by the numeric factor on the left side, then solve.

y = 92

6 0
3 years ago
Solve for x. Show the equation you used and your work.
levacccp [35]
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To solve this problem, you have to write a proportion with the given information. This can be done because the sides on the left and right are proportional with the values on the bottom.

36 / 24 = x / 18
x = 27
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