Question 1186996
want binomial n=12 p=0.6
Very straight forward with c. You can look at the table with n=20 p=0.6 and 4. The probability both pdf and cdf is 0.
For b, More than 17 is 18-20. For 18 it is 0.003, and 19 and 20 don't increase that significantly.
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for 13: the calculator will show that for 14 or more (1-biniomcdf(20,0.6,13)=0.2500
Can check that for 13: 0.1659.
for 14: 0.1244
for 15: 0.0746
for 16: 0.0350
for 17: 0.0123
and the rest is 0.003 from above
That is 0.416 or 41.6%
also 1-binomcdf(20,0.6,12), since want 12 but not 13 to get rid of the left side.