1. In class 10 A, there are 30 boys and 20 girls. In 10 B,there are 15 boys and 25 girls. One student is to
be selected from each class
What is the probability of choosing a pair with at least one boy?
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Answered by
1
Answer:
In class 10A, there are 20 girls of 40 students, so the probability of the student from class 10A is 20/40 -> 1/2 or 0.50.
In class 10B, there are 15 girls of 40 students, so the probability of the student from class 10B is 15/40 -> 3/8 or 0.375
To calculate the probability of both students being girls, you must multiply the two, so 0.50 x 0.375 = 0.1875 or 18.75% probability.
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Answered by
0
Answer:
probability = 35/2.....
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