a box contains 2 red marbles , 5 green marbles and 5 blue marbles. If we choose a marble, then another marble without putting the first one back in the box, what is the probability of the first one being green and the other one being blue

41% and 45%

Step-by-step explanation:

answer: the angel abc is 30°,and the abc is a triangle where the angel bac is 90°

so ac is the half of 24=12ft,and from the pythagorean theorem we find ba

ba=√bc^2-ac^2=√576-144=√432=12√3ft

so bac is 12+12√3=12(1+√3)ft