A box contains 4 white, 5 black, and 6 red balls. What is the probability of picking a black ball?
Practice Questions
1 question
Q1
A box contains 4 white, 5 black, and 6 red balls. What is the probability of picking a black ball?
1/3
5/15
1/4
5/15
Total balls = 4 + 5 + 6 = 15. Probability of black ball = 5/15 = 1/3.
Questions & Step-by-step Solutions
1 item
Q
Q: A box contains 4 white, 5 black, and 6 red balls. What is the probability of picking a black ball?
Solution: Total balls = 4 + 5 + 6 = 15. Probability of black ball = 5/15 = 1/3.
Steps: 6
Step 1: Count the number of white balls. There are 4 white balls.
Step 2: Count the number of black balls. There are 5 black balls.
Step 3: Count the number of red balls. There are 6 red balls.
Step 4: Add the number of all balls together: 4 (white) + 5 (black) + 6 (red) = 15 total balls.
Step 5: Identify how many of the total balls are black. There are 5 black balls.
Step 6: Calculate the probability of picking a black ball by dividing the number of black balls by the total number of balls: 5 (black) / 15 (total) = 1/3.
