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C(10,3) = 120 | C(10,3) = 120 | ||
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b) more 0s than 1s? | b) more 0s than 1s? | ||
Revision as of 09:01, 14 September 2008
How many strings of length 10 have.
a) exactly three 0s?
C(10,3) = 120
b) more 0s than 1s?
10 0s : C(10,10) = 1 9 0s : C(10,9) = 10 8 0s : C(10,8) = 45 7 0s : C(10,7) = 120 6 0s : C(10,6) = 210
Total = 386
