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A (7)-symbol code has (4) letters and (3) digits. It is formed from (6) letters and (5) digits without repetition. All digits must occupy consecutive positions. How many codes are possible?

Answer and explanation

Correct answer: (108000)

There are (5) possible positions for the block of three digits, then arrange digits and letters in order. Treat consecutive objects as a block.

Related tags

CodesConsecutive-BlockCountingFundamental Principle Of CountingPermutations And CombinationsMathematicsClass 11 Mcq

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