help cphill or anyone asap

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

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

Last one

We have 30 values

The median  occurs between th 15th and 16th value

This  is in the interval   20 ≤ h < 30