cpcoolestkid4
02.01.2020 •
Mathematics
Of 30 students in a class 17 have a brother, 20 have a sister, and 11 have a brother and a sister. what is the probability that a randomly selected student has a brother given they have a sister?
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Ответ:
11/30
Step-by-step explanation:
Since there are 30 students in total, and 11 of them have both a brother and a sister, then 11/30 (11 out of the 30 students) would be the probability of a student having a brother given that they have a sister.
Ответ:
Distribute.
12x-36+18=12x-12
Add like terms.
12x-18=12x-12
Add 12 to both sides.
12x-6=12x
Subtract 12x from both sides.
-6=0
?
NO SOLUTION