Respuesta :
The probability of choosing a boy from both classrooms is 19/20, the probability of choosing a girl from Classroom 101 and a boy from Classroom 103 is 39/100, and the probability of choosing a boy from Classroom 101 and a girl from Classroom 103 is 7/50
What is probability?
It is defined as the ratio of the number of favorable outcomes to the total number of outcomes, in other words, the probability is the number that shows the happening of the event.
Total number of students in classroom 101 = 13+7 = 20
Total number of students in classroom 103 = 8+12 = 20
The probability of choosing a boy from both classrooms:
= 19/20
Choosing a girl from Classroom 101 and a boy from Classroom 103:
Since both are independent event.
Probability of choosing a girl from Classroom 101 = 13/20
Probability of choosing a boy from Classroom 103 = 12/20
The probability of choosing a girl from Classroom 101 and a boy from Classroom 103:
= (13/20)(12/20)
= 156/400
= 39/100
Similarly, the probability of Choosing a boy from Classroom 101 and a girl from Classroom 103:
= (7/20)(8/20)
= 56/400
= 7/50
Similarly, we can find remaining probability.
Thus, the probability of choosing a boy from both classrooms is 19/20, the probability of choosing a girl from Classroom 101 and a boy from Classroom 103 is 39/100, and the probability of choosing a boy from Classroom 101 and a girl from Classroom 103 is 7/50
Learn more about the probability here:
brainly.com/question/11234923
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