A glass jar contains 6 white, 8 black, 4 red, and 3 blue marbles. If a single marble is chosen at random from the jar, what is the probability that it is black or blue?
Show answer & explanation
Correct answer: B
Explanation
The correct answer is option 2 i.e. .
Given that
A glass jar contains 6 white, 8 black, 4 red, and 3 blue marbles
Total marbles = 6 + 8+ 4 + 3 = 21
the probability that it is black or blue = (8/21) + (3/21) = 11/21