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OpenStudy (anonymous):
True or false? EXPLAIN! :)) 2. The number of permutations of two items from a data set is always two times the number of combinations when taking two objects at a time from the same data set.
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OpenStudy (anonymous):
Help! :c
OpenStudy (anonymous):
yes it is true..
OpenStudy (anonymous):
Can you please explain? :)
OpenStudy (anonymous):
|dw:1336549069228:dw| by formula...
OpenStudy (anonymous):
use the expansion of the expressions nP2 and nC2,to check...
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OpenStudy (anonymous):
OOh ok! thanks for your help :)
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