26. In how many ways can up to 4 students be selected from 6 girls and 5 boys if each selection must have an equal number of girls and boys? 180 n! 27. Prove that C, C-r by using the formula ,C,= rin
26. In how many ways can up to 4 students be selected from 6 girls and 5 boys if each selection must have an equal number of girls and boys? 180 n! 27. Prove that C, C-r by using the formula ,C,= rin
Chapter9: Sequences, Probability And Counting Theory
Section9.5: Counting Principles
Problem 51SE: Just-For-Kicks Sneaker Company offers an online customizing service. How many ways are there to...
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