Mathematics · Permutations and Combinations
The value of the summation ∑r=020 50-rC6 is equal to:
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 151C7 - 30C7✓
- 250C7 - 30C7
- 350C6 - 30C6
- 451C7 + 30C7
Correct answer
51C7 - 30C7
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