#866 · Combinatorics · Counting
Books on a shelf with English in middle
From a collection of 7 Latin books and 3 English books, 4 Latin books and 1 English book are to be placed on a shelf so that the English book occupies the middle position. In how many ways can this be done?
H. S. Hall & S. R. Knight, Higher Algebra (1891) · Ch. XI. Permutations and Combinations, Examples XI.a, No. 26
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