# If i have the following marblesGreen 3Red 4White 5Blue 8What is the possibility that I will pick a blue one without looking?

$number\;of\;red\;balls=4\\*number\;of\;green\;balls=3\\* number\;of\;white\; balls=5\\*number\;of\;blue\;balls=8\\* probability\;of\;getting\;a\;blue\;ball=\frac{favourable\;outcomes}{total\;outcomes}\\* favourable\;outcomes=8\\* total\;number\;of\;outcomes=3+4+5+8=20\\* probability\;of\;getting\;a\;blue\;ball=\frac{8}{20}=\frac{2}{5}$

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