3 Penalties
Number Theory
Level
3
A player will shoot 3 penalties. He has a 80% chance to score in the first one, 70% in the second one and 50% in the third. What are the chances in % that he scores at least 2 goals from those 3 penalties?
The answer is 75.
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1 solution
3C2(1/2)^2(1/2)^1 + 3C2(1/2)^3(1/2)^0=(3)(1/8)+(3)(1/8)(1)=3/8 + 3/8 = 3/4 = 75%