This math topic focuses on practicing how to determine the count of numbers in a set given their total sum and mean. It involves basic arithmetic and introduces students to concepts associated with statistics, particularly in calculating the number of data points when the average and total are known. The problems are framed in a multiple-choice format, providing a practical application of the mean formula in various contexts. This is part of a more comprehensive introduction to probability and statistics, particularly mean, median, and mode.
Work on practice problems directly here, or download the printable pdf worksheet to practice offline.
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If a set of numbers have a sum of 15, and a mean of 5, how many numbers are there?