Question 1122799
exactly 3: 12C3*0.27^3*0.73^9=0.2549
2: 0.2068
1: 0.1016
0:0.73^12=0.0229
So, at least 4 is 1- the above sum or 0.4138

Less than 8 is <=7 or 0.9953.
This makes sense, since the expected value is 0.27*12=3.24