<PRE><B>Question 1133253</B>
a)  z-score = (216 - 189)/44.7 = 0.604 is approximately 0.60
:
b)  -1.54 = (X - 189)/44.7
:
X - 189 = -68.838
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X = 189 - 68.838 = 120.162 is approximately 120.16
:
His blood cholesterol level is 120.16
:
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