问题
解答题
红黑球共40个,其中红球占62.5%,红球比黑球多多少个?
答案
40×[62.5%-(1-62.5%)]
=40×(62.5%-37.5%),
=40×25%,
=10(个).
答:红球比黑球多10个.
红黑球共40个,其中红球占62.5%,红球比黑球多多少个?
40×[62.5%-(1-62.5%)]
=40×(62.5%-37.5%),
=40×25%,
=10(个).
答:红球比黑球多10个.