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A box contains 10 balls, 4 of which are white and the rest are black. If one bal
A box contains 10 balls, 4 of which are white and the rest are black. If one ball is drawn at random, what is the probability that it is not black?
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Q1
A box contains 10 balls, 4 of which are white and the rest are black. If one ball is drawn at random, what is the probability that it is not black?
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Total balls = 10. Non-black balls = 4 (white). Probability = 4/10 = 2/5.
Questions & Step-by-step Solutions
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Q
Q: A box contains 10 balls, 4 of which are white and the rest are black. If one ball is drawn at random, what is the probability that it is not black?
Solution:
Total balls = 10. Non-black balls = 4 (white). Probability = 4/10 = 2/5.
Steps: 7
Show Steps
Step 1: Identify the total number of balls in the box. There are 10 balls.
Step 2: Determine how many of those balls are white. There are 4 white balls.
Step 3: Calculate the number of non-black balls. Since there are 4 white balls, the non-black balls are 4.
Step 4: Write down the total number of balls again, which is 10.
Step 5: To find the probability of drawing a non-black ball, use the formula: Probability = (Number of non-black balls) / (Total number of balls).
Step 6: Substitute the numbers into the formula: Probability = 4 / 10.
Step 7: Simplify the fraction 4/10 to get 2/5.
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