Home > Statistics > Probability Distribution

How many heads are expected in 28 tosses of a fair coin?

Answer 1

#14# heads.

As the probability of getting a head on tossing a fair coin is #1/2#, expected value of getting heads in 28 tosses of a fair coin is #28xx1/2=14#.

Additional information #-# In such cases data follows binomial distribution, in which case expected value is #np#, where there are #n# trials and #p# is the probability of getting desired result. The variance of data is #npq#, where #q=1-p#, where #q# is the probability not getting the desired result.

By signing up, you agree to our Terms of Service and Privacy Policy

Answer 2

Christopher Axton

The expected number of heads in 28 tosses of a fair coin is 14.

By signing up, you agree to our Terms of Service and Privacy Policy

Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.