In a survey of 1000 social media account holders, the following question was asked: how many social media accounts do you have? The results are summarized below:

Question

In a survey of 1000 social media account holders, the following question was asked: how many social media accounts do you have? The results are summarized below:
Answer             1-2               3-4                5 or more
Respondents    650              200                  150

b) What is the probability that a participant in the survey selected at random answered that they had three or four accounts?

What I did for the previous part (part a where it asked for the empirical probability distribution) :
P (S1)= 650/1000 = 0.65
P(S2)= 200/1000=0.20
P(S3) = 150/1000=0.15

Is it just 0.20 since it is asking for the random probability for 3 or 4 accounts?

lijm · Answer

To be more clear with the table, the 1-2 belongs to 650, 3-4 to 200, and 5 or more to 150.

anonymous · Answer

EXE you're messed up in the head