(6分)在今年的中考中,市区学生体育测试分成了三类,耐力类,

(6分)在今年的中考中,市区学生体育测试分成了三类,耐力类,速度类和力量类.其中必测项目为耐力类,抽测项目为:速度类有50米、100米、50米×2往返跑三项,力量类有原地掷实心球、立定跳远,引体向上(男)或仰卧起坐(女)三项.市中考领导小组要从速度类和力量类中各随机抽取一项进行测试,请问同时抽中50米×2往返跑、引体向上(男)或仰卧起坐(女)两项的概率是多少?

答案

解析:
速度类有3项,力量类有3项,所以共有3×3=9种情况,50米×2往返跑、引体向上(男)或仰卧起坐(女)两项的只有一种,所以概率是

相关题目

 ____ is known to me is that Jack has broken his promise _____he would buy me
 ____ is known to me is that Jack has broken his promise _____he would buy me a laptop for my birthday.   A. What; that       B. It; which         C. What; which          D
近年来,收入分配体制改革备受关注。收入分配体制改革虽然
近年来,收入分配体制改革备受关注。收入分配体制改革虽然涉及方方面面的问题,但其重心是初次分配领域。下列选项中,居民收入属于这一分配领域的
“Hey, Dad, are you going to come to my award ceremony tonight?” I   36 
“Hey, Dad, are you going to come to my award ceremony tonight?” I   36   asked my father. “I have to work late tonight. I doubt I’ll be able to   37   it on time. I am just too busy r
将状况相同的某种绿叶分成四等组,在不同的温度下分别暗
将状况相同的某种绿叶分成四等组,在不同的温度下分别暗处理1 h,再光照1 h(光照强度相同),测其重量变化,得到如下表的数据。 组别一二三四 温
Don’t be discouraged. Take things       they are and you will enjoy ev
Don’t be discouraged. Take things       they are and you will enjoy every day of your life. A. where               B. as                  C. when      
夏天的清晨,沅江河面上常会出现一层薄雾,这一现象的出
夏天的清晨,沅江河面上常会出现一层薄雾,这一现象的出现是由于:A.河水经过蒸发形成的水蒸气;  B.河水先蒸发后液化;C.河水先蒸发后凝固;   
把下面四个短句组成一个单句(可增减少量字词,但不得改
把下面四个短句组成一个单句(可增减少量字词,但不得改变原意)。 ①2001年3月23日14时,“和平”号空间站按指令准确坠落在预定地点。 ②这个坠落
    at the airport,he telephoned his wife and told her what he would do whe
    at the airport,he telephoned his wife and told her what he would do when he got home.   A. Once arrived    B. As soon as he reached   C. When he got     D. Upon arriving  

最新题目