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# Can someone help me with these questions

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Can someone help me with these questions

1) https://vle.mathswatch.co.uk/images/questions/question1004.png

2)https://vle.mathswatch.co.uk/images/questions/question1005.png

3)https://vle.mathswatch.co.uk/images/questions/question15707.png

4) https://vle.mathswatch.co.uk/images/questions/question17759.png

May 7, 2018
edited by Guest  May 7, 2018

#1
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1.

We have  a total of 10 students  who have either  a brother or a sister....

To find the number that goes  in the middle, x,  we can solve this

B  +  S   -  x  = 10

9 + 7  - x  =  10

16  - x  = 10

16  - 10  = x

6  = x

Here's the diagram :

May 7, 2018
#2
+101228
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2.

To find the number of people who use the fitness suite only...we can  take 57 - 36  = 21

To find the number of people who only use the swimming pool, we have 49 - 36 = 13

To  find those that use neither, we have :   100 - 36  - 21 - 13  = 30

Here's the diagram :

May 7, 2018
#3
+101228
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3.

May 7, 2018
#4
+101228
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4.

May 7, 2018