A box contains 10 balls, 4 of which are red and 6 are blue. If one ball is drawn
Practice Questions
Q1
A box contains 10 balls, 4 of which are red and 6 are blue. If one ball is drawn at random, what is the probability that it is not blue?
2/5
3/5
4/10
1/5
Questions & Step-by-Step Solutions
A box contains 10 balls, 4 of which are red and 6 are blue. If one ball is drawn at random, what is the probability that it is not blue?
Correct Answer: 2/5
Step 1: Identify the total number of balls in the box. There are 10 balls in total.
Step 2: Identify how many of those balls are red. There are 4 red balls.
Step 3: Determine how many balls are not blue. Since there are 4 red balls, the number of balls that are not blue is 4.
Step 4: Calculate the probability of drawing a ball that is not blue. This is done by dividing the number of red balls by the total number of balls: 4 (red balls) / 10 (total balls).
Step 5: Simplify the fraction 4/10 to get 2/5.
Probability – The likelihood of an event occurring, calculated as the number of favorable outcomes divided by the total number of possible outcomes.
Complementary Events – Understanding that the probability of an event not occurring can be calculated by considering the total outcomes minus the favorable outcomes.
