Can someone help me with this

The median of a data set is the measure of center that is found by adding the data values and dividing the total by the number of data values that is the value that occurs with the greatest frequency that is the value midway between the maximum and minimum values in the original data set that is the middle value when the original data values are arranged in order of increasing (or decreasing) magnitude

:24% of students in a class are girls. if there are less than 30 students in this class, how many students are there? how many girls are there?

1: 4 if the wew 35 surfboards at the beach how many were short boards?