Question

PROBABILITY QUESTION:

15% of children attending kindergarten have not had a measles vaccine. In an class of 20 students, what is the probability that at least one has NOT had a measles vaccine?

Answer 1

is it 0.96 which can also b written as 96%

Answer 2

if that the right answer i will show how i got it

Answer 3

Show it

Answer 4

yes please show steps, thats the right answer

Answer 5

ok first i found out the probability of getting 0 that have not had a measle vaccine using
nCr *q^n-r*P^r

Answer 6

where q= failures and p=success

Answer 7

Binomial distribution!

Answer 8

so the percent of failures is 85% because 15% have had not had a measle vaccine

Answer 9

but in the equation write them as 0.85 and 0.15

Answer 10

0.85= failures and 0.15=success, n=20 r=0

Answer 11

when u plug in everything and u get 0.038759531

Answer 12

okay makes sense so far

Answer 13

then u would use a equation i came up with which is No Restriction - What you Dont Want
where NR=1 and WYDW = P(no one who has not had a measle vaccine)

Answer 14

1-P(0)= 1-0.038759531=0.96

Answer 15

does that make sense?

Answer 16

okay yes it does

Answer 17

thank you so much

Answer 18

no problem