Решение задачи N2826 теория вероятностей

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2826. V urne nakhodyatsya 5 krasnykh, 4 sinikh i 3 belykh shara. Naudachu vynimayut 3 shara. Nayti veroyatnost´ togo, chto eto budut:
a) siniye shary
b) krasnyye shary
v) belyye shary
g) dva krasnykh i odin siniy shar
d) raznotsvetnyye shary
2826. In the urn there are 5 red, 4 blue and 3 white balls. 3 balls are taken out at random. Find the probability that it will be:
a) blue balls
b) red balls
c) white balls
d) two red and one blue ball
d) multi-colored balls

Detailed solution. Decorated in Microsoft Word 2003 (Quest decided to use the formula editor)