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OpenStudy (anonymous):
Twelve coins are tossed and placed in a line. Each coin can show either a head or a tail. (i) Find the number of different arrangements of heads and tails which can be obtained. (ii) Find the number of different arrangements which contain 7 heads and 5 tails.
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OpenStudy (anonymous):
@amoodarya pls help
OpenStudy (amoodarya):
each coin has t,h so for a suppose 12 house and each house can be t, or h |dw:1437139969837:dw|
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