一道英文数学概率题A box contains 4 black cubes and 6 white cubes.A cube is drawn from the box.Its colour noted and a cube of the other colour is then added to the box.A second cube is then drawn.(a).If both cubes are of the same colour,what

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一道英文数学概率题Aboxcontains4blackcubesand6whitecubes.Acubeisdrawnfromthebox.Itscolournotedandacubeoftheoth

一道英文数学概率题A box contains 4 black cubes and 6 white cubes.A cube is drawn from the box.Its colour noted and a cube of the other colour is then added to the box.A second cube is then drawn.(a).If both cubes are of the same colour,what
一道英文数学概率题
A box contains 4 black cubes and 6 white cubes.A cube is drawn from the box.Its colour noted and a cube of the other colour is then added to the box.A second cube is then drawn.
(a).If both cubes are of the same colour,what is the probability that both cubes were in fact white?
(b).The first ball is replaced before the second ball is added to the box.What is the probability that both cubes were white given that both cubes were of the same colour?

(a).5/7
(b).5/7

a.6/10*5/10=1/4
b.6/10*6/11+4/10*4/11=16/110+36/110=26/55

一道英文数学概率题A box contains 4 black cubes and 6 white cubes.A cube is drawn from the box.Its colour noted and a cube of the other colour is then added to the box.A second cube is then drawn.(a).If both cubes are of the same colour,what 一道数学概率题看不懂问一道mba数学概率题,13题为什么是a 数学31概率09一道题数学31概率11一道题数学31概率10一道题数学31概率08一道题数学31概率03一道题数学31概率02一道题数学30概率12一道题数学30概率11一道题数学30概率08一道题数学30概率07一道题数学30概率06一道题数学30概率05一道题英文版的数学概率题一道关于概率的英文数学题7) A box contains 3 red,4 white and 5 blue discs.Three discs are selected at randomfrom the box.Find the probability that:a) all three discs are the same colour,if the selection is with replacement b) all three dis 一道数学概率题求解答,可以上图