ow many 5-element subsets of [30] are there whose smallest element is at most 3?

Advanced Engineering Mathematics
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ISBN:9780470458365
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Chapter2: Second-order Linear Odes
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Question 4. How many 5-element subsets of [30] are there whose smallest element is at most 3?
Transcribed Image Text:Question 4. How many 5-element subsets of [30] are there whose smallest element is at most 3?
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