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katiedelgadillo
24.06.2019 •
Mathematics
The table shows the percentage of students in each of three grade levels who list soccer as their favorite sport. soccer sophomores (35%) 50% juniors (33%) 45% seniors (32%) 30% total (100%) (0.5)(0.35) + (0.45)(0.33) + (0.32)(0.3) = 0.4195 or about 42% ***find the probability, rounded to the nearest hundredth, that any student selected from all three grades is a junior who lists soccer as the favorite sport options 0.45 0.78 0.15
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Ответ:
0.353
Step-by-step explanation:
We are given the table shows the percentage of students in each of three grade levels who list soccer as their favorite sport.
Sophomores (35%)50%
Juniors (33%)45%
Seniors (32%)30%
Total (100%)= (0.5)(0.35) + (0.45)(0.33) + (0.32)(0.3) = 0.4195 ≈ 42%
Now we are supposed to find the probability, rounded to the nearest hundredth, that any student selected from all three grades is a junior who lists soccer as the favorite sport.
Junior who list soccer as their favorite sport =![33\% \times 45 \% = 0.33 \times 0.45=0.1485](/tpl/images/0010/4937/e165f.png)
Total students who list soccer as their favorite sport is 42% =0.42
Probability that any student selected from all three grades is a junior who lists soccer as the favorite sport =![\frac{0.1485}{0.42}](/tpl/images/0010/4937/26684.png)
=![0.3535](/tpl/images/0010/4937/309d1.png)
Hence the probability, rounded to the nearest hundredth, that any student selected from all three grades is a junior who lists soccer as the favorite sport is 0.353.
Ответ: