1. ## Binomial Distribution

Hi guys

ive got my as exam coming up and im trying to revise binomial distribution

my problem is i dont have a clue lol

ive been going through the textbook and one of the questions is

the question im on is this

A woman is trying to light a bonfire. She only has 4 matches left in her box

given that 10% of matches break

what is the probability that
(A) all 4 matches brake
(B) at least 1 match doesnt break

i worked out a to be 0.0001 but how the heck do i do b?
cheers

2. Originally Posted by scottyc
Hi guys

ive got my as exam coming up and im trying to revise binomial distribution

my problem is i dont have a clue lol

ive been going through the textbook and one of the questions is

the question im on is this

A woman is trying to light a bonfire. She only has 4 matches left in her box

given that 10% of matches break

what is the probability that
(A) all 4 matches brake
(B) at least 1 match doesnt break

i worked out a to be 0.0001 but how the heck do i do b?
cheers
Pr(at least 1) = 1 - Pr(none).