3. We have to calculate the relative frequency of the class "boys who want to go to the water park".
We can calculate the relative frequency as the quotient between the absolute frequency, which in this case is 60, and the total sample size, which is 210.
4. We have to estimate the probability of selecting a girl who wants to go skating.
As this class has an absolute frequency of 45, we can approximate the probability as:
Answer:
3. The relative frequency is approximately 0.29.
4. The probability is approximately 0.21.