tom wants to buy a sweater for $30. the sales tax in his city is 4%. how much tax is tom paying? What is the total cost for the
2 answers:
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Solution:
The permutation formula is expressed as
The combination formula is expressed as
where
Given that 6 objects are taken at a time from 8, this implies that
Thus,
Number of permuations:
Number of combinations:
Hence, there are 28 combinations and 20160 permutations.