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Subjects
Class 11MathematicsPermutations and CombinationsFundamental principle of countingHard
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An entry ticket has (2) letters, (1) color, and (2) digits. Letters are distinct, digits are distinct, and if the color is red, the first digit cannot be (0). There are (3) colors. How many tickets are possible?

Answer and explanation

Correct answer: (175500)

Letters have (26 \times 25) choices. Red gives (9 \times 9) digit choices, and the other two colors give (10 \times 9) choices each.

Related tags

PermutationsCombinationsCountingHardFundamental Principle Of CountingPermutations And CombinationsMathematicsClass 11 Mcq
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