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<p>#1 數學題again^n(今次係概率)<br /><small>有49個球,6個球全中就可以中頭獎<br />
<br />
求中六合彩頭獎既概率。<br />
<br />
[[i] 本帖最後由 Justice 於 2010-1-27 18:00 編輯 [/i]]</small><br />
1/27 16:24<br />
Justice<br /></p>
<p>#2 <br /><small>組合有: 49C6 x 43C1<br />
=(49x48x47x46x45x44 / 1x2x3x4x5x6) x43/1<br />
=(49! -43!) / 6! * 43<br />
= 13983816 * 43 = 601304088 個組合<br />
機會就係其中之一<br />
即係概率= 1/601304088</small><br />
1/27 16:32<br />
sammychan54<br /></p>
<p>#3 <br /><small>6億分 ..</small><br />
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