Math Problem Statement

A weighted coin has a
0.596 probability of landing on heads. If you toss the coin
12 times, what is the probability of getting heads more than
7 times? (Round your answer to
3 decimal places if necessary.)

Solution

This is a binomial probability problem, where we are tossing a weighted coin 12 times, and the probability of getting heads is 0.596. We are asked to find the probability of getting heads more than 7 times, i.e., for the number of heads k>7k > 7.

The binomial probability formula is:

P(X=k)=(nk)pk(1p)nkP(X = k) = \binom{n}{k} \cdot p^k \cdot (1-p)^{n-k}

Where:

  • nn is the number of trials (12 tosses),
  • pp is the probability of success (0.596),
  • XX is the random variable representing the number of heads,
  • kk is the number of heads (we want more than 7 heads).

To find the probability of getting more than 7 heads, we need to calculate:

P(X>7)=P(X=8)+P(X=9)+P(X=10)+P(X=11)+P(X=12)P(X > 7) = P(X = 8) + P(X = 9) + P(X = 10) + P(X = 11) + P(X = 12)

I'll calculate this for you using binomial probability values for each of these outcomes.The probability of getting more than 7 heads in 12 tosses of a weighted coin with a probability of 0.596 of landing on heads is approximately 0.4270.427 (rounded to 3 decimal places).

Would you like more details on the steps or any clarifications?

Here are some related questions:

  1. How would the probability change if the number of tosses increases?
  2. What is the probability of getting exactly 7 heads?
  3. How does the probability of tails affect the outcome?
  4. How would the distribution look graphically?
  5. What happens if the coin is fair, i.e., with p=0.5p = 0.5?

Tip: The binomial distribution becomes more symmetric and approaches a normal distribution as the number of trials increases.

Ask a new question for Free

By Image

Drop file here or Click Here to upload

Math Problem Analysis

Mathematical Concepts

Probability
Binomial Distribution
Random Variables

Formulas

Binomial probability formula: P(X = k) = (n choose k) * p^k * (1-p)^(n-k)
P(X > 7) = P(X = 8) + P(X = 9) + P(X = 10) + P(X = 11) + P(X = 12)

Theorems

Binomial Theorem

Suitable Grade Level

Grades 10-12