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Olin [163]
3 years ago
9

there are 600 pupils in a school. the ratio of boys to girls in this school is 3:5.How many girls and how many boys are in the s

chool
Mathematics
2 answers:
a_sh-v [17]3 years ago
7 0
In order to obtain a ratio of boys to girls equal to 3:5, the number of boys has to be written as 3 x and the number of girls as 5 x where x is a common factor to the number of girls and the number of boys. The total number of boys and girls is 600. Hence 

<span>3x + 5x = 600 </span>

Solve for x 

<span>8x = 600 </span>

<span>x = 75 </span>

Number of boys 

<span>3x = 3 × 75 = 225 </span>

Number of girls 

<span>5x = 5 × 75 = 375</span>
Elodia [21]3 years ago
3 0
3x+5x=600\\&#10;8x=600\\&#10;x=75\\\\&#10;3x=3\cdot75=225\leftarrow \text{boys}\\&#10;5x=5\cdot75=375\leftarrow \text{girls}
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3 years ago
Rewrite <img src="https://tex.z-dn.net/?f=%5Cfrac%7B200x%20-%20300%7D%7Bx%7D" id="TexFormula1" title="\frac{200x - 300}{x}" alt=
lord [1]

Answer:

We can rewrite this as \frac{200x}{x} + \frac{-300}{x}.

\frac{200x}{x} simplifies to 200 after eliminating x from the numerator and denominator and \frac{-300}{x} becomes -\frac{300}{x} so the final answer is 200 - \frac{300}{x}.

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3 years ago
Find the values of the variables. Show your work and explain your steps. The diagram is not to scale.
ivanzaharov [21]
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Assessment started: undefined.
Harman [31]
1,000:) is going to be your anwser!
5 0
2 years ago
PLEASE HELP ASAP WILL GIVE BRAINLIEST!
Alex777 [14]

Answer:

1.01

Step-by-step explanation:

Mean with outliner = (39.55 + 40.51 + 41.01 + 37.76+ 35.32 + 33.28 + 34.38 + 36.48 + 39.87 + 50.32 + 40.59 + 41.71)/12 = 39.23 seconds.

In this case, the outlier comes to be the data: 50.32. If we don't consider that data point, the mean equals:

Mean wihout outliner = (39.55 + 40.51 + 41.01 + 37.76+ 35.32 + 33.28 + 34.38 + 36.48 + 39.87 + 40.59 + 41.71)/11 = 38.22

The difference is:  39.23 - 38.22 = 1.01

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