Probability Questions

Multiple choice
  1. $\frac{{53}}{{125}}$
  2. $\frac{{54}}{{125}}$
  3. $\frac{{56}}{{125}}$
  4. $\frac{{52}}{{125}}$
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Probability of white (p) = 4/10 = 0.4. Probability of red (q) = 6/10 = 0.6. We want exactly one white in three draws (with replacement). This is a binomial distribution: 3C1 * (0.4)^1 * (0.6)^2 = 3 * 0.4 * 0.36 = 1.2 * 0.36 = 0.432. 0.432 = 432/1000 = 54/125.

Multiple choice
  1. $1/2$
  2. $4/9$
  3. $5/9$
  4. $2/3$
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

This is a probability problem involving state transitions. The silver coin moves between purses. The calculation leads to 5/9.