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The probability of drawing 4 spades from a deck of 52 cards is 11 in 4165. The probability of the first spade is 13 in 52, or 1 in 4. The second spade is 12 in 51, or 4 in 17. The third spade is 11 in 50. The fourth spade is 10 in 49. Multiply these four probabilities together and you get 440 in 166600, or 11 in 4165.
(17+17+17+17+17+17+17+17+17+17+17)-(29+29+29) = 100
119
It is: 17 to the power of 5
17% of 100 is 17, so 17% of 300 is 17*3 = 51