According to the IRS, approx. 80% of taxpaters filed electorincally in 2012. For 15 randomly selected 2012 taxpayers, answer the following:
a) Find the probability that 7 or 8 of them filed electronically
Find the following:
b) The expected number who filed electronically in this group of 15 taxpayers. That is, fidn the mean of this distribution.
c) The standard deviation of this distrubiton