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The average tensile strength for a particular aircraft bolt is 32.06 kN with a variance of...

The average tensile strength for a particular aircraft bolt is 32.06 kN with a variance of 0.01 kN. What proportion of bolts will have a tensile strength less than 31.9 and more than 32.3 kN.

a) 0.4452

b) 0.8000

c) 0.4918

d) 0.0630

e) 0

f) 1

g) 0.9370

Math   Statistics-And-Probability   
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