Question

solved question of permutation and combination of class 11th

Answer 1

(1) = 10!/2! =(10×9×8×7×6×5×4×3×2×1)/2
=》10×9×8×7×6×5×4×3×1
=》1814400

(2) = 8!/2!×5!
=》(8×7×6×5×4×3×2×1)/2 ×5×4×3×2×1
=》20160 × 120
=》2419200

(3) = 14 × 10! /2!
=》14 ×(10×9×8×7×6×5×4×3×2×1)/2
=》14 × 1814400
=》25401600