Question

Kaidah pencacahan
9!/3! ( 9! - 3 )!

Answer 1

Penjelasan dengan langkah-langkah:

= 9!/3! x (9! - 3!)

= (9x8x7x6x5x4 x 3!)/3! x (9x8x7x6x5x4x3! - 3!)

= 9x8x7x6x5x4 x (3!(9x8x7x6x5x4 - 1))

= 60.480 x (3!(60.480 - 1))

= 60.480 x (3! x 60.479)

= 60.480 x (6x 60.479)

= 60.480 x 362.874

= 21.946.619.520