Question 965656
Find the probability of choosing a red checker,
{{{P[R]=20/28=5/7}}}
So then the probability of not choosing a red checker is,
{{{P[B]=2/7}}}
Find the number of combinations for 8 red checkers in 10 selections.
{{{C(10,8)=45}}}
So then,
{{{P=C(10,8)*P[R]^8*P[B]^2}}}
{{{P=45*(5/7)^8*(2/7)^2}}}
{{{P=(45*390625*4)/(282475249)}}}
{{{P=(70312500)/(282475249)}}}
{{{P=0.249}}}