Question 1030408
You could choose a red then blue or blue then red so calculate each probability.
{{{P(R,B)=(7/10)(3/9)=7/30}}}
{{{P(B,R)=(3/10)(7/9)=7/30}}}
So then,
{{{P=P(R,B)+P(B,R)}}}
{{{P=2(7/30)}}}
{{{P=7/15}}}