What is the formula for circumference?

2pi(r)

Hope this helps, though I can't see how it wouldn't ;)

0.1 is the probability that the next customer will purchase a loaf of bread.    

Step-by-step explanation:

We are given the following in the question:

Number of customers,n = 500

Number of customers that bought loaf of a bread = 50

Relative Frequency Approach:

The relative frequency approach is useful when the classical approach cannot be used.If an experiment is performed  a large number of time and a particular outcome occurs a percentage of the time, then that particular percentage is close to the probability of that outcome.

Thus, using relative frequency approach of probabilities,

P( next customer will purchase a loaf of bread) =

Thus, 0.1 is the probability that the next customer will purchase a loaf of bread.