A box contains 6 red, 3 white, 2 green, and 1 black (total 12) identical balls. What is the least number of balls nevessary to take out randomly ( without looking) to be sure getting, atleast one red ball?
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Answer:7 ballsStep-by-step explanation:Look for the worst case scenario:Get 3 white, 2 green, and 1 black.That adds up to: 3 + 2 + 1 = 6.+1 red ball: 6 + 1 =77 balls