Answer:
0.01
Step-by-step explanation:
1) the rule is: {required probability}={probability of 2 red marbles} / {all possible combinations 2 of 15};
2) according to the rule above the required probability is:
[tex]\frac{C^2_2*C_{13}^0}{C^2_{15}}=\frac{2!*13!}{15!}=\frac{2}{14*15}=\frac{1}{105}=0.0095238=0.01.[/tex]
