The total number of the students in the class is
100.
The number stundents who are Japanese among the 100 students
= 60.
The number of students who are boys among the Japanese
sttudents = 10.
Since the choice random , the probabilty of any
student being cosen is equally likely and ,therefore,
1/100.
Therefore there being 60 Japanese students among the 100,
the probability of the student chosen is Japanese, is (1/100)*60 =
0.6 .
Since the are 10 Japapanese boy students, the
probabilty that the chosen student is a Japanese student is equal to 10/100 =
0.1.
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