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JEE Main & Advanced JEE Main Paper (Held on 08-4-2019 Afternoon)

  • question_answer
    The number of four-digit numbers strictly greater than 4321 that can be formed using the digits 0,1,2,3,4,5 (repetition of digits is allowed) is : [JEE Main 8-4-2019 Afternoon]

    A) 288                 

    B) 306

    C) 360     

    D)   310

    Correct Answer: D

    Solution :

    [a] The number of four-digit numbers Starting with 5 is equal to \[{{6}^{3}}=216\] [b] Starting with 44 and 55 is equal to \[36\times 2=72\] [c] Starting with 433,434 and 435 is equal to \[6\times 3=18\] [d] Remaining numbers are 4322, 4323, 4324, 4325 is equal to 4 so total numbers are 216 + 72 + 18 + 4 = 310


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