There are 6 yellow balls and several white balls in the pocket, all of which are the same except for the color, the probability of drawing a yellow ball is (3/4), how many white balls are less than the yellow balls.
口袋中有6个黄球和若干白球，除颜色外都相同，摸黄球机率(3/4)，白球比黄球少多少个．
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