<PRE><B>Question 1083878</B>
expected value is x*p(x)=0.15*20=3
exactly 5 is 20C5(0.15^5)(0.85^15)=0.1028
5 or greater.  Do 0 to 4
4 is 20C4(.15^4*.85^16)=0.1821
3 is 20C3(.15^3*.85^17)=0.2428
2 is 190 etc. 0.2293
1 is 20*.15*.85^19=0.1368
0 is .85^20=0.0388
Total is 0.9326
5 or greater is 1-0.9326=0.0674</PRE>