A box contains 10 balls, of which 4 are white and 6 are black. If one ball is dr

Practice Questions

Q1
A box contains 10 balls, of which 4 are white and 6 are black. If one ball is drawn at random, what is the probability that it is black?
  1. 3/5
  2. 2/5
  3. 1/2
  4. 6/10

Questions & Step-by-Step Solutions

A box contains 10 balls, of which 4 are white and 6 are black. If one ball is drawn at random, what is the probability that it is black?
  • 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 black. There are 6 black balls.
  • Step 3: Use the formula for probability, which is the number of favorable outcomes divided by the total number of outcomes.
  • Step 4: Substitute the numbers into the formula: Probability of drawing a black ball = Number of black balls / Total balls = 6 / 10.
  • Step 5: Simplify the fraction 6/10 to its lowest terms, which is 3/5.
  • Probability – The likelihood of an event occurring, calculated as the number of favorable outcomes divided by the total number of possible outcomes.
  • Basic Counting – Understanding how to count the total number of items and the specific items of interest.
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