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Can anybody help me with this problem ? (_11^)P_7
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2 votes
Can anybody help me with this problem ? (_11^)P_7

User UGuntupalli
by
8.2k points

1 Answer

6 votes
₁₁P₇ =
(11!)/((11 - 7)!)
₁₁P₇ =
(11!)/(4!)
₁₁P₇ =
(11 * 10 * 9 * 8 * 7 * 6 * 5 * 4 * 3 * 2 * 1)/(4 * 3 * 2 * 1)
₁₁P₇ = 11 × 10 × 9 × 8 × 7 × 6 × 5
₁₁P₇ = 110 × 72 × 42 × 5
₁₁P₇ = 7920 × 210
₁₁P₇ = 1,663,200

User Chrysalis
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