Aspinner is divided into an unknown number of equal-sized sections. your friend spins it 100 times and tells you that it landed on section one 25 times. what is the best estimate of the number of sections the spinner is divided into?

Four

Step-by-step explanation:

Given: A spinner is divided into an unknown number of equal-sized sections.

The total number of times the spinner spins = 100

The number of times it landed on one section = 25

Now, the probability of getting one section:-

         (1)

i.e. the probability of getting each section is one -fourth.

Since the probability of getting each section is also given as :-

                          (2)

From (1) and (2), we have

The best estimation of the number of sections the spinner is divided into is four.