Question

An unbiased coin is tossed 5 times. Find the chance that head will appear exactly 3 times

Answer 1

this situation can also referred as
3 coin are tossed together so what is probability of getting 3 head

so no of event=8
HHH
TTT
HHT
HTT
TTH
THH
THT
HTH

SO P (HHH)=1/8