Question 1171376
a. exactly 5 is 10C5*0.51^5*0.49^5=0.2456 also 2ndVARSbinompdf(10,0.51,5)ENTER
b. at least 6 is for 6 through 10=0.4018 1-2ndVARSbinomcdf(10,0.51,5)ENTER, since calculator does binomial from the left, have to subtract the left side from 1 to get the right side
c. fewer than 4 is 0.1560