Question
Two marbles are drawn without replacement from a jar
containing 6 blue, 4 yellow, and 2 white marbles. What is the probability that both marbles are yellow?Solution
Total marbles = 12
Yellow marbles = 4
Required probability = ( 4 C 2 ) / ( 12 C 2 ) = 6 / 66 = 1/11
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14, 18, 20, 25, 27, 30, 24, a, 16, 20
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When the digits of a two-digit number are interchanged, the new number becomes 11 more than 120% of the original number. If the sum of the digits is 8, ...
