Math Problem Statement

A dartboard has 6 equally sized slices numbered from 1 to 6. Some are white and some are grey. A dart will be tossed and will land on a slice at random. (a) What is the probability that the dart lands on a white slice? (b) What is the probability that the dart lands on a white slice, given that the dart lands on an odd-numbered slice?

Solution

Let's analyze and solve each part of this probability problem based on the dartboard shown:

  1. Identify white and grey slices: The dartboard has six slices labeled 1 through 6. It looks like:
    • White slices: 1, 2, 4
    • Grey slices: 3, 5, 6

Part (a)

What is the probability that the dart lands on a white slice?

  • Total slices = 6
  • White slices = 3 (slices 1, 2, and 4)

The probability of landing on a white slice is: Number of white slicesTotal slices=36=12\frac{\text{Number of white slices}}{\text{Total slices}} = \frac{3}{6} = \frac{1}{2}

Part (b)

What is the probability that the dart lands on a white slice, given that it lands on an odd-numbered slice?

  • Odd-numbered slices = 1, 3, 5 (total of 3 odd-numbered slices)
  • Among these, the white odd-numbered slice is only slice 1.

The probability that it lands on a white slice, given it lands on an odd-numbered slice, is: Number of white odd-numbered slicesTotal odd-numbered slices=13\frac{\text{Number of white odd-numbered slices}}{\text{Total odd-numbered slices}} = \frac{1}{3}

Would you like further details on the solution steps?


Related Questions:

  1. What would the probability be if there were 8 slices instead of 6?
  2. How would the probability change if slice 4 was grey?
  3. What if the dartboard had an uneven number of white and grey slices?
  4. How do probabilities differ between mutually exclusive and non-mutually exclusive events?
  5. How does conditional probability affect the outcome in part (b)?

Tip: In probability, always verify the total number of favorable outcomes versus possible outcomes to ensure accurate calculations.

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Math Problem Analysis

Mathematical Concepts

Probability
Conditional Probability

Formulas

P(A) = Number of favorable outcomes / Total number of outcomes
P(A | B) = Number of favorable outcomes for A given B / Total number of outcomes for B

Theorems

Basic Probability
Conditional Probability

Suitable Grade Level

Grades 6-8