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3 years ago

There are 10 boys and 10 girls. What is the probability that 2 boys will be chosen

Mathematics

2 answers:

stealth61 [152]3 years ago

8 0

Answer:

about 24%

Step-by-step explanation:

1/2 times 9/19

0.5 times 9/19

is about 0.24

0.25 mean about 24%

Aliun [14]3 years ago

6 0

Answer:

Approximately 24%.

Step-by-step explanation:

There are $_{10}C_2=45$ ways of choosing two boys and $_{20}C_2=190$ ways of choosing two kids (boys or girls). So the probability of getting two boys is $45/190=0.23684210526$ .

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Simplify the expression 8^2+9(12/3*2)-7 Step by step please :)

Xelga [282]

Answer:

129

Step-by-step explanation:

${8}^{2} + 9(12 \div 3 \times 2) - 7$

$64 + 9(12 \div 3 \times 2) - 7$

$64 + 9 \times 8 - 7$

$64 + 72 - 7$

$\boxed{\green{= 129}}$

4 0

3 years ago

PLEASE HEPP IM STUCK

Ann [662]

Answer:

m = -4

Step-by-step explanation:

We are given that a line intersects the points (-2, 9) and (3, -11).

We want to write the slope of this line.

The slope (m) can be found using the formula $\frac{y_2-y_1}{x_2-x_1}$ , where $(x_1, y_1)$ and $(x_2, y_2)$ are points.

Even though we have everything we need to calculate the slope, let's label the values of the points to avoid any confusion & mistakes.

$x_1=-2\\y_1=9\\x_2=3\\y_2=-11$

Now substitute these values into the formula (remember that the formula has subtraction).

m= $\frac{y_2-y_1}{x_2-x_1}$

m= $\frac{-11-9}{3--2}$

Simplify.

m= $\frac{-11-9}{3+2}$

Subtract the values on top.

m= $\frac{-20}{3+2}$

Now add the values on the bottom together.

m= $\frac{-20}{5}$

Now divide -20 by 5.

8 0

2 years ago

There are 48 students in a school play. The ratio of boys to girls is 5 : 7. How many more girls than boys are in the play?

VikaD [51]

8 more boys
Hope this helps

4 0

3 years ago

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BigorU [14]

Answer:

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3 years ago

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The number in a fraction that tells how many equal parts are in the hall or in a group

Paul [167]

I think the answer is "the denominator"

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3 years ago