Acompact disc is designed to last an average of 4 years with a standard deviation of 0.8 years.

what is the probability that a cd will last less than 3 years?

1.11%

10.56%

86.65%

100%

10.56%

Step-by-step explanation:

We are given A compact disc is designed to last an average of 4 years with a standard deviation of 0.8 years.

We are supposed to find What is the probability that a CD will last less than 3 years

We will use z-score formula:

Substitute the values in the formula

Now refer the z score table

So, the value of -1.25 is 0.1056 =

Thus , the probability that a CD will last less than 3 years is 10.56%

step-by-step explanation:

i dont get

answer;

the correct answer

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have a nice day < 3