Suppose that the times it takes adult women to run a mile are normally distributed with an unknown mean and standard deviation.
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It is given in the question that
You work at a T-shirt printing business. Of 1,300 T-shirts shipped, 106 are imperfect.
So out of 1300 T-shirts, number of perfect t-shirts are
So probability that the t-shirt is printed correctly is
And to find the percentage, we have to multiply it by 100, and on doing so we will get 92 % .