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A code has (2) capital letters and (2) digits. Letters are chosen from (A,B,C,D), and digits from (0,1,2,3,4). Letters do not repeat but digits may repeat. How many codes are possible?

Answer and explanation

Correct answer: (300)

Letters have (4 \times 3) ways and digits have (5 \times 5) ways. Check repetition rules separately for each part.

Related tags

CodesRepetitionCountingFundamental Principle Of CountingPermutations And CombinationsMathematicsClass 11 Mcq

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