Page 6 - taller matematicas_Neat

P =15.504
 P 20 5
n r
P
4 4= 4! =4*3*2 =24

P =161.700
8! 8∗7∗6∗5! 100 3
P = =8*7*6 =336
8 3= 8−3 ! 5!

P =75.287.520
100 5

P 5! = 5∗4! =5
5 4= 5−4 ! 4!
P =45
10 8

P 5! =5*4*3*2 =120
5 5=

20! 20∗19∗18!
P = =20*19 =380
20 2= 20−2 ! 18!

7! 7∗6∗5∗4∗3!
P = =7*6*5*4 =840
7 4= 7−4 ! 3!