You survey 200 people about electronics they own. the results show that 33 over 40 people own a cell phone. of these people, 10 over 11 also own an mp3 player. a. what fraction of the people own a cell phone and an mp3 player? b. how many people own a cell phone, but not an mp3 player? explain?

(w – 2.5)(w + 2.5)

(–4v – 9)(–4v + 9)

step-by-step explanation:

answer:

125 yards

explanation:

75+50=125. that is my answer

85.560%

step-by-step explanation:

conditional probability is defined as:

p(a|b) = p(a∩b) / p(b)

in other words, the probability that a occurs, given that b has occurred = the probability that both a and b occur / the probability that b occurs.

in this example:

p(turns 64 | turns 44) = p(turns 64 & turns 44) / p(turns 44).

if someone turns 64, they must have already turned 44, so:

p(turns 64 | turns 44) = p(turns 64) / p(turns 44)

on page 42, we see that of the original 100,000, 94944 turn 44, and 81234 turn 64.   therefore:

p(turns 64 | turns 44) = 81234 / 94944

p(turns 64 | turns 44) = 0.85560

idk idk idk idk idk

step-by-step explanation: