Question 840849
{{{P(Y)=4/7}}}
{{{P(R)=3/7}}}
.
.
In that order,
{{{P=(4/7)(4/7)(4/7)(3/7)}}}
{{{P=192/2401}}}
In any arbitrary order,
{{{P=(4/7)(4/7)(4/7)(3/7)+(4/7)(4/7)(3/7)(4/7)+(4/7)(3/7)(4/7)(4/7)+(3/7)(4/7)(4/7)(4/7)}}}
{{{P=768/2401}}}