if in a data smallest value is 27, the largest value is 48 and the size of the class interval is 3 then the number of classes will be ____ ?

Smallest value = 27
Largest value = 48
Class interval size = 3
Substituting the given values into the formula:
Number of classes = (48 – 27) / 3
calculating the subtraction:
Number of classes = 21 / 3
Simplifying the division:
Number of classes = 7