    ‘Seritence-1:.a\bay contains'4. balls: Two balls dre.  Grcivn’ at. randont, and:are fatind:to be white:  Whatis the probability that all balls ore white?.    Sentence:2 fa bag contains five ‘balls: Twa  balls'are deawn arid aré founs to be white. What  is the probability that ail the balls are white?