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3 years ago

Probability word problem

Mathematics

2 answers:

Crazy boy [7]3 years ago

3 0

Answer:

see below

Step-by-step explanation:

A can speak french

There are 10 students who can speak french, 4 girls and 6 boys

P(french) = speak french/ total

= 10/30

= 1/3

B is a boy

There are 16 boys

P (boy) = boys/total

= 16/30

8/15

C girl who can speak french

There are 4 girls who can speak french

P (girl who can speak french) = girl who can speak french/ total

=4/30

2/15

raketka [301]3 years ago

3 0

Answer:

a) 1/3

b) 8/15

c) 2/15

Step-by-step explanation:

Total students: 30

Girls: 14

Boys: 30 - 14 = 16

French speaking: 4 + 6 = 10

a) P(French speaking) = 10/30

1/3

b) P(boy) = 16/30 = 8/15

c) P(French speaking girl) = 4/30

= 2/15

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Help!! BRAINLIEST TOO!

natulia [17]

Answer:

36.5 inches

Step-by-step explanation:

Given

See attachment for the given data

Required

Which length is closest to 4.2lb

The given data is a linear dataset.

So, we start by calculating the slope (m)

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

Pick any two corresponding points from the table

So, we have:

$(x_1,y_1) = (8,1.21)$

$(x_2,y_2) = (12,1.63)$

So:

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

$m =\frac{1.63 - 1.21}{12 - 8}$

$m =\frac{0.42}{4}$

$m =0.105$

The linear equation is then calculated using:

$y = m(x - x_1) + y_1$

This gives:

$y = 0.105 * (x - 8) + 1.21$

Open bracket

$y = 0.105x - 0.84 + 1.21$

$y = 0.105x + 0.37$

To get the length closest to 4.2lb,

we set $y = 4.2$

Then solve for x

So, we have:

$y = 0.105x + 0.37$

$4.2 = 0.105x + 0.37$

Collect like terms

$0.105x= 4.2 - 0.37$

$0.105x= 3.83$

Solve for x

$x= 3.83/0.105$

$x\approx 36.5$

4 0

3 years ago

What are vertically opposite angles

NeTakaya

When two lines cross, there are four angles at the place where they cross.
Two angles that do NOT share a side are vertical angles. There are two pairs
of vertical angles where the lines cross.

Also, by the way, vertical angles are always equal to each other. It's often
very helpful to know that.

7 0

3 years ago

Read 2 more answers

Two more questions , 15 points.

Mumz [18]

The formula that is useful for solving both of these problems is ...

$(v_2)^2-(v_1)^2=2ad\qquad\text{a=acceleration, d=distance}\\\\ \text{where $v_1$ and $v_2$ are initial and final velocities}$

9. Given v₁=15, a=9.8, d=10, find v₂.

... (v₂)² = 15² + 2·9.8·10

... v₂ = √421 ≈ 20.5 . . . . m/s

10. Given d=12 m when a=-9.8 m/s² and v₂=0, find d when a=0.17·(-9.8 m/s²).

The formula tells us that d=(v₁)²/(2a), which is to say that the distance is inversely proportional to the acceleration. If acceleration is 0.17 times that on earth, distance will be 1/0.17 ≈ 5.88 times that on earth.

(12 m)/0.17 ≈ 70.6 m

7 0

3 years ago

My grade is a 77%, if i get a 0% on a paper worth 30% of my grade, what will my grade be now??

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