A school had 1,200 students last year and only 1,080 students this year. What was the percentage decrease in the number of students?

: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?

The amount spent on food and drink by 20 customers is shown below what is the modal amount spent and the median? 40 25 8 36 18 15 24 27 43 9 12 19 22 34 31 20 26 19 17 28

Indicate the formula for the following conditions: p^c(n,r)=