The score is given by:
z=(x-mean)/s.d
In the question above:
x=1300
mean=1200
s.d=200
Thus:
z=(1300-1200)/200
=100/200
=0.5
The answer is 0.5
Is a problem solving method that uses that fact that any number or expression can be multiplied by one without changing it's value.
X/14=29
x=14*29
x=406
Hope this helps :)
47/5=9.40
9*5=45
47/5= 9 2/5
