Learn how to say Permutations correctly in English with this tutorial pronunciation video.
Oxford dictionary definition of the word permutation:
each of several possible ways in which a set or number of things can be ordered or arranged:
his thoughts raced ahead to fifty different permutations of what he must do
[mass noun] Mathematics the action of changing the arrangement, especially the linear order, of a set of items.
British a selection of a specified number of matches in a football pool.
late Middle English (in the sense ‘exchange, barter’): via Old French from Latin permutatio(n-), from the verb permutare ‘change completely’ (see permute)