Answer: b) -0.625
<u>Step-by-step explanation:</u>
The formula for the z-score is:
The only option that fits is E, because:
f(10)=4×10+10=50
The sample was 10 numbers.
4 of the numbers are less than 301.
So 4 out of 10 would be defective.
4/10 = 0.4 x 100 = 40%
He would expect 40% to be defective.
3x-10>4+7x-3
3x-10>1+7x
-4x-10>1
-4x>11
x<-11/4
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