Answer:
a) (i) 1200
b) (ii) 3750
c) (i) ![\frac{3}{20}](https://tex.z-dn.net/?f=%5Cfrac%7B3%7D%7B20%7D)
Step-by-step explanation:
a) Total number of students = 5000
Ratio of teachers to students = 6 : 25
i) Number of teachers = ?
By the given ratio, we can let the number of teachers = 6![x](https://tex.z-dn.net/?f=x)
and we can let the number of students = 25![x](https://tex.z-dn.net/?f=x)
![25x = 5000\\\Rightarrow x = 200](https://tex.z-dn.net/?f=25x%20%3D%205000%5C%5C%5CRightarrow%20x%20%3D%20200)
Therefore, number of teachers = 6
200 = <em>1200</em>
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b) A Quarter of the students own i-phone classic 20.
ii) Number of students who do not own an i-phone classic?
As per question statement,
Number of students who own i-phone classic 20 =
= 1250
Number of students who do not own i-phone classic 20 = 5000 - 1250 = <em>3750</em>
<em></em>
c) Number of students who own samsung galaxy a80s = 60% of students who own i-phone classic 20 =
= 750
Fraction of students who own samsung galaxy a80s = Number of students having samsung a80s divided by total number of students
![\dfrac{750}{5000} = \dfrac{3}{20}](https://tex.z-dn.net/?f=%5Cdfrac%7B750%7D%7B5000%7D%20%3D%20%5Cdfrac%7B3%7D%7B20%7D)