estimate the probability that someone selects randomly responded 'no' to a survey given that it was known that they were not in year 1 or 2?

Question

year 1 no:25, yes:41

year 2 no:29, yes:54

year 3 no:27, yes:42

year 4 no:44, yes:33

year 5 no:14, yes:32

Answer 1

Jamie,

" Given" that the person who responded was not from tear one or 2, we have to add everybody from year 3 to 5:

27+42+44+33+14+32 = 192 --- this the "given"

from these people 27+44+14 = 85 answered "no"

Therefore the answer is p = 85/192