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3 cards from this section. Quick, good the night before a test.
What is the probability of getting exactly 2 heads in 4 flips of a fair coin?
Remember to use combinations.
With 5 tosses of a fair die, what is the probability of rolling a four exactly once?
Think about the applicable formula.
What formula is used for binomial probability?
Think about the components of success and trials.
In a binomial distribution, if n=10 and k=5, does that mean there are exactly five successes?
Consider the meaning of 'k' in our context.
In a binomial experiment where p = 0.3 and n = 15, what is the probability that exactly 6 trials are successful?
Be careful with the combinations; those can be trickier!
What is the expected number of successes in 20 trials with a success probability of 0.2?
Think about how to determine expectation from trials and success rates.
5 more questions in this section. Enroll free to practise them all.
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