Question 359460
{{{P(R)=0.90}}}
The assumption is that the choice is binary, right handed or left handed.
{{{P(L)=0.10}}}
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{{{P(6R)=28*(0.9)^6*(0.1)^2=highlight(0.1488)}}}
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At least 6 means 6,7, and 8.
{{{P(7R)=8*(0.9)^7*(0.1)^1=0.3826}}}
{{{P(8R)=1*(0.9)^8*(0.1)^0=0.4305}}}
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{{{P=P(6R)+P(7R)+P(8R)=0.1488+0.3826+0.4305}}}
{{{highlight(P=0.9619)}}}