Question

Question-A bag contains 25 marbles: 10 black, 13 red, and 2 blue. A marble is drawn from the bag at random. What is the probability of getting a red or a blue marble?
My attempt-so that 50 marbles total and red and blue would be 15 so 15/50 =3/10? did i mess up on this problem because 3/10 not a option on answers.

Answer 1

No there are only 25 marbels
\[25= 10 black+13 red+2 blue\]

Answer 2

oh ok i see where i messed up

Answer 3

15/25 = 3/5

Answer 4

thank you