Homework Answers
P(a student 7 or more heads) =P(X>=7)=P(X=7)+P(X=8)=(8C7)*(0.5)8+(8C8)*(0.5)8=0.035156
hence probability that 3rd student is first to toss 7 or more heads
=(1-0.035156)2*0.035156 = 0.0327
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