Answer:
50% of all students scored more than 48 marks.
Step-by-step explanation:
1) The baseline of the box, in a box plot is the first quartile, the line in the middle is the median or Q2 and the last line (or top line) is the third quartile. Namely,
![Q_{1}=30, Q_{2}=48 \:and\:Q_{3}=70](https://tex.z-dn.net/?f=Q_%7B1%7D%3D30%2C%20Q_%7B2%7D%3D48%20%5C%3Aand%5C%3AQ_%7B3%7D%3D70)
2) The Question says "nobody took 30, 48 or 70 as their grades. But 120 students gained less than 70", i.e. 120 are within the 75% of the sample.
3) If
then 50% of the students scored more than 48. And 50% of the students scored less than 48. That is also known as the Median.
So 50%, the half of all students scored more than 48 marks.
Answer:
it would be 6
Step-by-step explanation:
Answer:
-2/6
Step-by-step explanation:
the negative is applied to the entire fraction so it doesnt matter if its at top or bottom
10x/100=15
x/10=15
x=15·10
x=150
60x/100=18
3x/5=18
3x=18·5
3x=90
x=30
Answer:
y=-8
Step-by-step explanation:
First, rewrite the equation in slope-intercept form:
![y=-\frac{8}{3}x-8](https://tex.z-dn.net/?f=y%3D-%5Cfrac%7B8%7D%7B3%7Dx-8)
Now just look at the slope-intercept form and your y-intercept is -8, and your slope is
.
If you don't know what slope-intercept form is it is y=mx+b where m is your slope and b is your y-intercept.
Hope this helps! :)