Question 2 of 10 2 points in a survey, 250 adults and children were asked whether they know how to swim. the survey data are shown in the relative frequency table. total can swim 0.34 adults children total cannot swim 0.06 0.12 0.48 what percentage of the people surveyed can swim? o a. 18% 0 0 0 0 b. 34% c. 82% d. 48%

C

Step-by-step explanation:

The total amount of people taht were surveyed was 100 yet 82 can swim

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step-by-step explanation:

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