The event that either M1 or M2 fails has probability

by the addition rule. Failure events are independent, so

so that

Denote this probability by
. Then
follows a geometric distribution with this parameter
and has density

The expectation is
.
Answer:
divide both sides by 1.57 so
x=0.636943y
Answer:
The correct answers are 40, 120, 240, and 320
Step-by-step explanation:
.
Answer:
the tank is 3 feet deep
Step-by-step explanation:
I got 15.65 then rounded up to 3
Answer:
4 is answer of the problem