Binomial Probability: 10 Trials, 5 Successes, p = 0.5
The probability of getting exactly 5 heads in 10 fair coin flips (p = 0.5) is approximately 24.6%.
How to use this tool
- Enter trials (n), successes (k) and probability of success (p) in the fields above.
- Results update instantly as you type — or click Calculate.
- Read your p(x = k) and the full breakdown beneath it.
Calculate the probability of exactly 5 heads in 10 coin flips using the binomial probability formula with p = 0.5.
Frequently asked questions
- What is the binomial distribution?
- The binomial distribution models the number of successes in n independent yes/no trials, each with the same probability p of success. Classic examples: coin flips, pass/fail tests.