Wednesday, November 20, 2013

What is the probability that if a student chosen at random is Japanese, it is also a boy in the following case? A language class has 100...

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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