simplify 9C4! . . . . . . . . . . . . . . . . . . . . . . A. 126 . B. 15,120 . C. 5 . D. 3,024******
9 answers
9C4! = 0
Anyway,
9C4 = 9!/(5!4!) = 9*8*7*6 / 4*2*3*1 = 126
9P4 = 9!/5! = 9*8*7*6 = 3024
a Man Has Fallen for am Man in Lego City
A Helicopter has fallen into the city in Lego River Quick! build a man
a River has fallen into the man in lego City Quick build a HeliCopter !
Just did the test.