<PRE><B>Question 1130975</B>
The first 6 are unsuccessful is 0.371^6
the 7th is successful with probability 0.629
Their product is 0.0016

at most 4 trials means fewer than 5 trials.
4 trials would be 0.371^3*0.629=0.0321
3 trials would be 0.371^2*0.629=0.0866
2 trials would be 0.371*0.629=0.2334
1 trial would be 0.629
This sum is 0.9811

at least 6 trials would be 0.371^5*0.629=0.0044 for 6
for 7 it is 0.0016 from above
for 8 it is 0.371^7*0.629=0.0006
for 9 it is 0.0002
for 10 it is 0.0001
The sum is 0.0069</PRE>