SOLUTION: In how many ways can 5 letters be chosen from{Q,R,S,T,U,V,W}, assuming that the order of the choices doesn't matter and that repeats are not allowed?
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Question 1143547: In how many ways can 5 letters be chosen from{Q,R,S,T,U,V,W}, assuming that the order of the choices doesn't matter and that repeats are not allowed?
This question might be equivalently re-formulated in this way:
"How many subsets of 5 elements can be formed from 7 distinct elements {Q, R, S, T, U, V, W} ?"
The answer is = = 21 subsets.
Here is the symbol for the number of all combinations of 7 distinct elements taken 5 at a time.
