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What is the value of seven factorial minus five factorial?
A4620
B4720
C4820
D4920
Answer & Solution
Correct answer: D. 4920
1. Seven factorial is 5040 and five factorial is 120.
2. The two are subtracted only after each is evaluated in full.
3. Taking 120 away from 5040 leaves 4920.
_Source: NCERT Class 11 Mathematics, Ch 6 'Permutations and Combinations'_
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