3 years ago

In a class of 30 students, 6 have a brother and 12 have a sister. There are 14 students

1 answer:

Elena-2011 [213]3 years ago

3 0

30 students

14 have no siblings

that leaves 16 with siblings

6 have brothers and 12 have sisters which = 18 so 2 of the students have both a brother and a sister

2/30 students have a brother and a sister

1/15 chance

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