標題:
Permutation and Combination
發問:
Mr and Mrs Fung invite 10 friends to their house warming party.a) (i) When their friends arrive, Mr and Mrs Fung shake hand with each of them. How many hand-shakings are there?a) (II) If everyone in the house shakes hand with each other, how many hand-shakings are there?b) By the end of the party, they take a... 顯示更多 Mr and Mrs Fung invite 10 friends to their house warming party. a) (i) When their friends arrive, Mr and Mrs Fung shake hand with each of them. How many hand-shakings are there? a) (II) If everyone in the house shakes hand with each other, how many hand-shakings are there? b) By the end of the party, they take a photo. They are arranged in 2 rows of 6, find the number of possible arrangements if (i) Mr and Mrs Fung stand in different rows (ii) Mr and Mrs Fung stand next to each other
最佳解答:
a(i) 2*10 =20 a(ii) 12C2=12*11/2 =66 b(1) Mr F v 1v 2 v 3 v 4 v 5 v
其他解答:
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