Respuesta :
Firstly, in the question, the number of marbles is given as,
Blue -8
Green-10
Yellow-7
Red-6
They ask the probability of selecting ared or yellow marble.
Now, The total number of marble(Red+yellow) which will be drawn from the bag is as follows:
Red+yellow=6+7
Red+yellow=13
The total number of the marbles in the bag is as follows:
Total marbles=Blue+Green+Yellow+Red
Tptal marbles=8+10+7+6
Total marbles=31
Now, probability of selecting one marble from the bag that to be belong the red or yellow categories as follows:
[tex]\begin{gathered} P=\frac{(\operatorname{Re}d+Yellow)C1}{(\text{Total marbles)C1}} \\ P=\frac{13C1}{31C1} \\ P=\frac{13}{31} \end{gathered}[/tex][tex]Thus,\text{ the probability of selecting red or yellow from the bag is }\frac{13}{31}\text{.}[/tex]Now, the second part of your question is also covered by me in the upper part of problem.
