Answer:
![(1)/(6)](https://img.qammunity.org/2020/formulas/mathematics/middle-school/1hfsyqujpiw8kz1nwo0zeow75fj0n2oyv6.png)
Explanation:
Probability is typically given in the form of a fraction where the denominator is the total number of outcomes and the numerator is the number of desired outcomes. Since both of these events, picking a marble and flipping a coin, are independent (one doesn't rely on the other), we can find each of their probabilities and multiply them:
![(yellow)/(marbles)=(1)/(3)](https://img.qammunity.org/2020/formulas/mathematics/middle-school/2eoy9c7qxmsgasmo3768829qcx5ak4hrxg.png)
![(head)/(heads/tails)=(1)/(2)](https://img.qammunity.org/2020/formulas/mathematics/middle-school/lcocdwavo9nl7q3et7r8hf9micor3d4ym9.png)