Question

A bag contains 10 black balls, 5 red balls and 5 white balls and a ball is drawn randomly from it. What is the probability of getting either a red or a white ball?

• A. \(1/4 \)
• B. \(1/2 \)
• C. \(3/4 \)
• D. \(1 \)

Hint:

You can also solve this by finding the probability of the "opposite" event. Since the only other option is a black ball, $P(\text{Red or White}) = 1 - P(\text{Black})$.
$1 - (10/20) = 1/2$.

Answer 1

The Correct Option is B