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https://vle.mathswatch.co.uk/images/questions/question15345.png      question b onlny

 

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 May 2, 2020
 #1
avatar+111329 
+1

First one

 

b)    Note  that  3 numbers are contained in set A    and  7  are not in set A

 

So.....A '  means the elements  not in set A

 

So  the probability that a number is not in set A  =      7  / [ 3 + 7 ]  =   7 / 10  =   .7

 

 

cool cool cool

 May 2, 2020
 #2
avatar+111329 
+1

Second one

 

a)   medan

We have 30 values.....the median  falls between the 15th and 16th value

This = 3 goals

 

b)  mean

 

[ 2(0) + 8(1) + 4(2)  + 10(3)  + 6(4) ]  / 30  =  70 / 30  =  7 / 3   =  2 + 1/3   goals

 

cool cool cool

 May 2, 2020
 #3
avatar+111329 
+1

Last one

 

We have 30 values

 

The median  occurs between th 15th and 16th value

 

This  is in the interval   20 ≤ h < 30

 

 

cool cool cool

 May 2, 2020

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