7 cards drawn from a deck without replacement what is probabilty one is a spade
C(13,1)C(39,6)/C(52,7)
= 13(3262623)/133784560
= .317
Can you see the logic of my calculation by looking at the C(n,r) expressions ?
= 13(3262623)/133784560
= .317
Can you see the logic of my calculation by looking at the C(n,r) expressions ?