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multiplication and addition principle for count possibilities??/
we toss a fair coin 5 times and recored the sequence of head and tails obtained.how may sequences are possible that start with head OR end with head.?
so what i did was using addition theorm i divided this complex process into 3 simple partitions like below
X1=start with head AND end with head
X2=start with head AND end with tail
X3=start with tail AND end with head
so my answer should be X1+X2+X3...
but I am supposed to find X1,X2,and X3 by using the multiplication theorem but I am little bit confused about how to use it
can anyone help me out.thanks!~!
we toss a fair coin 5 times and recored the sequence of head and tails obtained.how may sequences are possible that start with head OR end with head.?
so what i did was using addition theorm i divided this complex process into 3 simple partitions like below
X1=start with head AND end with head
X2=start with head AND end with tail
X3=start with tail AND end with head
so my answer should be X1+X2+X3...
but I am supposed to find X1,X2,and X3 by using the multiplication theorem but I am little bit confused about how to use it
can anyone help me out.thanks!~!