Miss Silva needs to select a group of 5 girls to be trained for a dance competition against other schools. If there are a total of 25 students available, how many different groups are possible?
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This can be done using the combination formula, which is given by: C(n, r) = n! / (r!(n-r)!) where n is the total number of students available and r is the number of students we want to choose. In this case, n = 25 and r = 5. Plugging these values into the Show more…
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