Answer :
Given:
15 red marbles and 36 blue marbles.
Required:
pull out 2 marbles at random at the same time, find the probability that both are red.
Explanation:
15+36=51 marbles in total.
At our first pull, there is an 15/51 chance that a red will be pulled--the number of red out of the total number.
At the second pull there is a 14/50 chance that the second marble will be red as well--how many red/total are still in there.
From here, we multiply our two fractions together:
We get
[tex]\frac{15}{51}\times\frac{14}{50}=0.0812[/tex]Now we multiply our numerators we get 210and denominators2550
[tex]\frac{210}{2550}=0.08235294117[/tex]When we divide, we get about 0.08235294117 or = 8.235294117%
Required answer:
[tex]\frac{210}{2550}[/tex]