JEE Main & Advanced Sample Paper JEE Main Sample Paper-43

  • question_answer
    If p, q and r are simple propositions, then\[(p\hat{\ }q)\,\,\hat{\ }\,(q\,\hat{\ }r)\] is true, then

    A)  p, q and r are all false                     

    B)  p, q and r are all true

    C)  p and q are true and r is false             

    D)  p is true and q and r are false

    Correct Answer: B

    Solution :

     \[h={{h}_{w}}+\frac{{{h}_{o}}{{d}_{o}}}{{{d}_{w}}}\] is true means \[=100+\frac{400\times 0.9}{1}\] and \[=100+360=460\] are both true. Hence, p, q and r are all true.

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