How to solve a question about probability frequency distribution
Stuck on a problem in statistics about probability frequency distribution? This how to article will show you how to solve these probability problems in just a few easy steps.
Sample question: In a sample of 43 students, 15 had brown hair, 10 had black hair, 16 had blond hair, and 2 had red hair. Use a frequency distribution table to find the probability a person has neither red nor blond hair.
Step 1: Make a table.
List the items in one column and the tally in a second column.
Step 2:Add up the totals.
In the sample question we’re asked for the odds a person will not have blond or red hair. In other words, we want to know the probability of a person having black or brown hair.
Brown = 15/43 (15 out of 43 students have brown hair)
Black = 10/43 (10 out of 43 students have black hair)
15/43 + 10/43 = 25/43 (25 out of 43 students have either brown or black hair)