In United States currency, a nickel is worth 5 cents, a penny is worth 1 cent, and a dime is worth 10 cents. 100 cents equals one dollar. If a hand purse contains 6 nickels, 5 pennies and 4 dimes, what is the probability of picking a coin other than a nickel twice in a row if the first coin picked is not put back? | [td]8  25
|
[/td] | [td]12 35
|
[/td]
[tr][td=16][/td][/tr][td] 13 35
|
[/td] [tr][td=16][/td][/tr][td] 9 25
|
[/td]
[tr][td=16][/td][/tr][td]17 25
|
[/td]最后这道问的是什么意思？我选的d
If n is a non-negative integer such that 12 n is a divisor of 3,176,793, what is the value of n12 – 12 n ? | [td]- 11[/td] | [td]- 1[/td]
[tr][td=16][/td][/tr][td]0[/td] [tr][td=16][/td][/tr][td]1[/td]
[tr][td=16][/td][/tr][td]11[/td] | 
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发表于 2012-3-6 15:09:16
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