Summer Clouds moderators
24/10/2017 at 10:36-
huynh anh phuong 09/06/2020 at 12:14
That group will have : 12 + 8 = 20 ( students )
The probability that the 1st student is girl is: \(8:20=\dfrac{2}{5}\)
The probability that the 2nd student is girl is : \(\left(8-1\right):\left(20-1\right)=\dfrac{7}{19}\)
The probability that both student are girl is : \(\dfrac{2}{5}\cdot\dfrac{7}{19}=\dfrac{14}{95}\)