Question 589623
3.	The probability that a bulb produced by a factory will fuse after certain period of time is 0.05. Find the probability that out of 5 such bulbs
a.	None fuses
b.	Not more than 2 fuse
c.	More than 2 fuse 
.
a) .95^5=.7738
.
b) 
(x+y)^5 for x=.95 and y=.05
x^5+5x^4y+10x^3y^2
=.9988
.
c) 1-.9988=.0012
.
Ed