1. For a perfect square, put D = b^2 - 4ac = 0 [2k + 4]^2 - 4 [4 - k] [8k + 1] = 0 4k^2 + 16 + 16k - 4 [32k + 4 - 8k^2 - k] = 0 4k^2 + 16 + 16k - 128k - 16 + 32k^2 + 4k = 0 36k^2 - 108 k = 0 k^2 - 3k = 0 k(k - 3) = 0 k = 0 or k = 3

    For a perfect square, put D = b^2 – 4ac = 0

    [2k + 4]^2 – 4 [4 – k] [8k + 1] = 0
    4k^2 + 16 + 16k – 4 [32k + 4 – 8k^2 – k] = 0
    4k^2 + 16 + 16k – 128k – 16 + 32k^2 + 4k = 0
    36k^2 – 108 k = 0
    k^2 – 3k = 0
    k(k – 3) = 0
    k = 0 or k = 3

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  2. Yes . It is possible via NIOS. You can give 10th Examination even you have not done any schooling. NIOS Admission for October 2020 is going on. You can apply online before January 31, 2020. For further inquiry, you may visit to following page: https://www.tiwariacademy.com/nios/nios-online-admissionRead more

    Yes .
    It is possible via NIOS. You can give 10th Examination even you have not done any schooling. NIOS Admission for October 2020 is going on. You can apply online before January 31, 2020.

    For further inquiry, you may visit to following page:
    https://www.tiwariacademy.com/nios/nios-online-admission/

    or call directly to Tiwari Academy for any doubt.

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  3. Your son can give final exams for class 12 in April 2021. But if you take admission right now (before 31 January 2020) you can give your few exams in October 2020. In this way you will get more time to prepare for the exams. For example: Give two subjects exams in October 2020 and rest in April 2021Read more

    Your son can give final exams for class 12 in April 2021. But if you take admission right now (before 31 January 2020) you can give your few exams in October 2020. In this way you will get more time to prepare for the exams.

    For example: Give two subjects exams in October 2020 and rest in April 2021.

    For more information or suggestion, visit to website:
    https://www.tiwariacademy.com/nios/nios-online-admission/

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  4. p = P (Brown eye) = 0.6 q = 1 - p = 1 - 0.6 = 0.4 Probability of selecting exactly 5 person having brown eyes = C(8, 5) p^5 q^3 = (8!)/[5! x 3!] . (0.6)^5 x (0.4)^3

    p = P (Brown eye) = 0.6
    q = 1 – p = 1 – 0.6 = 0.4

    Probability of selecting exactly 5 person having brown eyes =

    C(8, 5) p^5 q^3 = (8!)/[5! x 3!] . (0.6)^5 x (0.4)^3

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  5. Through NIOS, it is possible. If you are already student of NIOS, just fill the fee till December 20, 2019 and appear in April exam. There is no need to take re-admission in NIOS. NIOS Admission is valid for 5 years. But if you have given exam through any other board, you have option to give ON DEMARead more

    Through NIOS, it is possible. If you are already student of NIOS, just fill the fee till December 20, 2019 and appear in April exam. There is no need to take re-admission in NIOS. NIOS Admission is valid for 5 years.

    But if you have given exam through any other board, you have option to give ON DEMAND exam in Feb, March, April or June 2020.

    If you have any further query, please visit to website given below and to Tiwari Academy helpline:
    https://www.tiwariacademy.com/nios/nios-online-admission/

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