Question

If four coins are tossed find chance that there are 2 heads and 2 tails

Answer 1

If 4 coins tossed then
sample space = {(H,H,H,H);(H,H,H,T);(H,H,T,H); (H,T,H,H);(H,H,T,T);(H,T,H,T);(H,T,T,H);(H,T,T,T);(T,T,T,T);(T,T,T,H);(T,T,H,T);(T,H,T,T);(T,T,H,H);(T,H,T,H);(T,H,H,T);(T,H,H,H)}
No of possible outcomes of 2heads & 2tails= 6
Probability = (no of possible outcomes)/(total no of outcomes)
P (E) = 6/16
P (E) = 3/8