'How many bit strings of length ten contain exactly four 1s? C(10,4) B P(10,4) 4i0 10*9*8*7/2 104'
Added by Sherry M.
Step 1
We can do this using combinations, so the number of ways to choose four positions out of ten is C(10,4). Once we have chosen the positions for the 1s, we can fill the remaining six positions with 0s. So the total number of bit strings of length ten with exactly Show more…
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