Answer releted to cpt exam june-2010

Hello,

      please given me answer of cpt exam june-2010 some qusation iam confused request o given answer

       1) In a pack of playing cards with joker then getting spade king----------

               A) 4/52  B) 4/13  C) 1/52  D) 1/54

     2) Variance of standard Normal distribution is -----------

            A) 1   B)  μ  C) 0    D) σ²   

    ^{3) The number of ways of arranging 6 boys and 4 girls in a row , so that all the girls are together ?}

               ^{A) 6! 4!  B) 2, 7! 4!   C) 7! 4!   D) 2 ( 6! 4!)}