The experimental probability of an event happening is the ratio of the number of times the event occurs to the total number of trials or observations.
In this case, the event is a student planning to take dance, and the total number of students surveyed is:
39 + 33 + 52 + 144 + 35 = 303
Therefore, the experimental probability of a randomly selected student planning to take dance is:
P(dance) = number of students planning to take dance / total number of students surveyed
P(dance) = 144 / 303
Simplifying the fraction by dividing both the numerator and denominator by 3, we get:
P(dance) = 48 / 101
So the experimental probability that a randomly selected student plans to take dance is 48/101 or approximately 0.475.