## Algebra 1: Common Core (15th Edition)

$\frac{2}{7}$
The events are dependent because the marbles are not replaced 4 of the 7 marbles are red: P(red)=$\frac{4}{7}$ 3 of the 6 remaining marbles are red: P(red after red)=$\frac{3}{6}$=$\frac{1}{2}$ P(red then red)=P(red) $\times$ P(red after red) P(red then red)=$\frac{4}{7}$ $\times$ $\frac{1}{2}$ P(red then red)=$\frac{2}{7}$