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JEE Main & Advanced JEE Main Paper Phase-I (Held on 09-1-2020 Evening)

  • question_answer
    If \[{{C}_{r}}\equiv {}^{25}{{C}_{r}}\] and \[{{C}_{0}}+5.{{C}_{1}}+9.{{C}_{2}}+.....+(101).{{C}_{25}}={{2}^{25}}.\] k, then k is equal to___. [JEE MAIN Held on 09-01-2020 Evening]

    Answer:

    51


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