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Nupur and Sheetal play a game "eight time coin throw”. If the fair coin shows heads, Nupur gets a point & if it shows tails, Sheetal gets a point. After eight throws, they compare their scores. What is the probability that the game will be a tie?


Options:
A .   18
B .   19
C .   35128
D .   7128
E .   33128
Answer: Option C
:
C
For a tie, there would be 4 heads and 4 tails.

Probability of "4” heads in 8 throws can be found  using nCr pr qnr = 8C4 (12)4 (12)4 = 35128



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