# The number 7

The number of faulty units in a carton of a particular product is known to be normally distributed with a Mean of 10 and a variance of 25. What portion of a given carton of the product is expected to contain___ faulty units?

(I) less than 8

(ii) more than 11

(iii) between 9 and 12

(I) less than 8

(ii) more than 11

(iii) between 9 and 12

## Correct answer:

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