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Mathematics 13 Online
OpenStudy (anonymous):

can someone tell me how to solve this type of problem?? A class of 21 students has 9 girls and 12 boys.What is the probability of a teacher randomly calling on a boy @SolomonZelman

OpenStudy (anonymous):

\[\frac{ 12 }{ 21 }\]How you solve, is look at the amount of boys to the total students. It can also be written as:\[12:21\]You should always simplify if possible.

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