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lianna [129]
3 years ago
9

Students on a field trip at an amusement park were asked their grade in school. The table shows the results of the survey.

Mathematics
2 answers:
muminat3 years ago
6 0
C) I KNOW IT IS!!
SO DO THIS ONE!!
stira [4]3 years ago
3 0

Answer:  Option 'C' is correct.

Step-by-step explanation:

Since we have given that

Grade    Number of Students

4th                   45

5th                   25

6th                   60

7th                   50

8th                    60

9th                    45

Total number of students is given by

45+25+60+50+60+45 = 285

So, the central angle for 9th grade would be

\dfrac{45}{285}\times 360^\circ\\\\=56.8^\circ\\\\\approx 57^\circ

Hence, Option 'C' is correct.

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A box has 16 candies.12 red and 4 yellow.If you were picking candies from the box without looking.How many candies would you hav
jeka57 [31]

We want to get the probability of randomly picking two candles of the same color. We will see that this probability is 0.6

First, the thing that we know is that there are 16 candles, 12 red and 4 yellow.

The probability of getting a red candle in the first pick is given by the quotient between the number of red candles and the total number of candles:

  • p = 12/16 = 3/4

The probability of getting another red candle is computed in the same way, but now there are 11 red candles and 15 candles in total:

  • q = 11/15

The joint probability is given by the product of the two individual probabilities:

P = p*q = (3/4)*(11/15) = 33/60 = 0.55

Now we must do the same thing but with the yellow candles, the probability of getting a yellow candle in the first draw is:

  • p = 4/16 = 1/4

For the second candle we have:

  • q = 3/15 = 1/5

The joint probability is:

P' = p*q = (1/4)*(1/5) = 1/20 = 0.05

Then the probability of getting two candles of the same color is the sum of the two above:

P'' = 0.55 + 0.05 = 0.6

If you want to learn more about probabilities, you can read:

brainly.com/question/251701

5 0
3 years ago
Read 2 more answers
Anita took 1/6 of a cake and Barry took 60% of what remained. What fraction of original cake is left. Explain full method.
Sedaia [141]
The cake = 1
1-1/6=5/6
60% as a fraction =3/5
5/6-3/5
25/30-18/30
7/30
There are 7/30 of the original cake left.

Hope this helps :)
8 0
3 years ago
Read 2 more answers
Need help with this math question 30 points correct answers only pls
Likurg_2 [28]

its the third answer

Step-by-step explanation:

and its only 5 points not 30

3 0
3 years ago
Read 2 more answers
60,000 is one tenth of
Tatiana [17]
600,000 u just have to multiply it by 10

4 0
3 years ago
I’m stuck, please give the explanation for the first question.
gladu [14]
----------------------------------------------
Define x:
----------------------------------------------
Let x be the number of students in the second class:
⇒second class = x

There are 3 more students in the first class than in the second class:
⇒first class = x + 3

There are 2 more students in the third class than in the second class:
⇒third class = x + 2

----------------------------------------------
Expression for each class:
----------------------------------------------
First class = x + 3
Second class = x
Third class = x + 2

----------------------------------------------
Expression for total number of students:
----------------------------------------------
Total = x + 3 + x + x + 2
Total =  3x + 5

----------------------------------------------
Find x:
----------------------------------------------
There are 80 students in total, so
3x + 5 = 80
3x = 75
x = 25

----------------------------------------------
Find the number of students in each class:
----------------------------------------------
First class = x + 3 = 25 + 3 = 28
Second class = x = 25
Third class = x + 2 = 25 + 2 = 27

--------------------------------------------------------------------------------------------
Answer: There are 25 students in the second class.
--------------------------------------------------------------------------------------------
6 0
4 years ago
Read 2 more answers
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