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1) https://vle.mathswatch.co.uk/images/questions/question15884.png 

2) https://vle.mathswatch.co.uk/images/questions/question15884.png

3) https://vle.mathswatch.co.uk/images/questions/question15884.png

4) https://vle.mathswatch.co.uk/images/questions/question15884.png

5) https://vle.mathswatch.co.uk/images/questions/question3035.png

6) https://vle.mathswatch.co.uk/images/questions/question3035.png

7) https://vle.mathswatch.co.uk/images/questions/question3035.png

8 )https://vle.mathswatch.co.uk/images/questions/question3035.png

Guest Jul 7, 2018
edited by Guest  Jul 7, 2018
 #1
avatar+91213 
+1

1.

 

Let the number  of voters  = V

 

Since we have 360°  in a circle, we have that

 

The number of   women voters  =   (360 - 130 )  / 360 V  =   (230 / 360) V  =   (23 / 36) V

 

And the number of  men  voters  is  (130 / 360) V  = (13/36) v

 

And we know that   (23/36) V  - (13/36)V  = 2880   simplify

 

(10/36)V  = 2800

 

(5/18)V  = 280      multiply both sides by  18/5

 

V  = 2800 ( 18/5)   = 10080 voters

 

 

cool cool cool

CPhill  Jul 7, 2018
edited by CPhill  Jul 7, 2018
 #2
avatar+91213 
+1

5.

 

Since 60 do drama and sports....then  85 - 60  = 25   are in drama alone

And 200 - 60  =  140   are in sports alone

 

So...the total  number of students that do  drama and sports  =    25  + 60 + 140  =  225

 

So  there are    330  - 225  =   105 who don't participate in drama or sports

 

So....the probability  is       105  / 330   =   7/22  ≈   31.8%

 

 

cool cool cool

CPhill  Jul 7, 2018

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