Merry and bright? a string of christmas lights con-
tains 20 lights. the lights are wired in series, so that
if any light fails, the whole string will go dark. each
light has probability 0.98 of working for a 3-year
period. the lights fail independently of each other.
find the probability that the string of lights will
remain bright for 3 years.

0.6676

Step-by-step explanation:

given that A string of Christmas lights con-

tains 20 lights. The lights are wired in series, so that

if any light fails, the whole string will go dark. Each

light has probability 0.98 of working for a 3-year

period.

Each light is independent of the other.

The probability that the string of lights will

remain bright for 3 years.

= Probability that each light does not fail

= multiplication (prob of one light does not fail)

=

1. 8

2. 9

3. 20

4. 3

5. 17

6. 2.2

7. 11.25

8. 1

9. 14

10. 2

step-by-step explanation:

thats the first half

answer: x=60