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# A box contains 8 red and 3 yellow balls. Three balls are drawn at random. What is the expected number of red balls drawn?

A box contains 8 red and 3 yellow balls. Three balls are drawn at random. What is the expected

number of red balls drawn?

Assuming we are to remove one ball at a time without replacing, then, we can use a tree diagram. (it is attached below)... View the full answer

• Please rate one of answers, the one you prefer, as the best. Thank you.
• EngMuk
• Jul 19, 2016 at 9:55pm
• Sorry, I forgot to attach.
• EngMuk
• Jul 19, 2016 at 9:58pm

Red ball = 11C8                  =... View the full answer

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