MathematicsMedium75×since 2002Q4879A bag contains 30 white balls and 10 red balls. 16 balls are drawn one by one randomly from the bag with replacement. If X be the number of white balls drawn, then (mean of Xstandard deviation of X)\left( {{{mean\,\,of\,X} \over {s\tan dard\,\,deviation\,\,of\,X}}} \right)(standarddeviationofXmeanofX) is equal to :A4B323\sqrt 232C433{{4\sqrt 3 } \over 3}343D434\sqrt 343Check answerSkip