The circumferences of WNBA basketballs follow a normal distribution where mean = 29.0 ; and standard deviation = 0.1 inches.

What proportion of WNBA basketballs are SMALLER than 29.1 inches? Round to the nearest percent

And we can find this probability using the normal standard distribution, excel or a calculator and we got:

And if we convert this into percent we got 84.13% rounded to the nearest percent would be:

84%

Step-by-step explanation:

Let X the random variable that represent the circumferences of a population, and for this case we know the distribution for X is given by:

Where and

We are interested on this probability

And the best way to solve this problem is using the normal standard distribution and the z score given by:

If we apply this formula to our probability we got this:

And we can find this probability using the normal standard distribution, excel or a calculator and we got:

And if we convert this into percent we got 84.13% rounded to the nearest percent would be:

84%

answer: the answer is 35%