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13. 11 P. = 11,880, find r.9. In how many ways 4 books can be selected out of 6 books? Find also the permutation of the bocks selected. 26.. In how mand |
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Answer» Books selected = 4C6= 4! /(6! ×2!) = 1/5×6×2= 1/60 15,360 |
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