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再请教一道机警题[讨论][求助]
A roullete wheel has numbers 1 to 8. The wheel is turn 3 times , and each time the number where the ball landed is noted. What is the possible number of ways so that the sum of the 3 numbers is 16?
除硬列各项排法, 有没有其他思路能在两分钟内搞定? |
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