ÌâÄ¿ÄÚÈÝ

NBA×ܾöÈü²ÉÓÃ7³¡4ʤÖÆ£¬¼´Èôij¶ÓÏÈȡʤ4³¡Ôò±ÈÈü½áÊø£®ÓÉÓÚNBAÓÐÌØÊâµÄÕþ²ßºÍ¹æÔò£¬ÄܽøÈë¾öÈüµÄÇò¶ÓʵÁ¦¶¼½ÏÇ¿£¬Òò´Ë¿ÉÒÔÈÏΪ£¬Á½¸ö¶ÓÔÚÿһ³¡±ÈÈüÖÐȡʤµÄ¸ÅÂÊÏàµÈ£®¸ù¾Ý²»Íêȫͳ¼Æ£¬Ö÷°ìÒ»³¡¾öÈü£¬×éÖ¯ÕßÓÐÍûͨ¹ý³öÊÛµçÊÓת²¥È¨¡¢ÃÅƱ¼°ÁãÊÛÉÌÆ·¡¢Í£³µ·Ñ¡¢¹ã¸æ·ÑµÈÊÕÈë»ñÈ¡ÊÕÒæ2 000ÍòÃÀÔª£¨Ï൱ÓÚÀºÇò¾ÞÐǿƱȵÄÄêн£©£®
£¨1£©ÇóËùÐè±ÈÈü³¡ÊýXµÄ¸ÅÂÊ·Ö²¼£»
£¨2£©Çó×éÖ¯ÕßÊÕÒæµÄÊýѧÆÚÍû£®
·ÖÎö£º£¨1£©ËùÐè±ÈÈü³¡ÊýXÊÇËæ»ú±äÁ¿£¬ÆäËùÓпÉÄÜȡֵΪ4£¬5£¬6£¬7£¬¸ù¾ÝÁ½¸ö¶ÓÔÚÿһ³¡±ÈÈüÖÐȡʤµÄ¸ÅÂÊÏàµÈ£¬µÃµ½±äÁ¿ ·ûºÏ¶ÀÁ¢Öظ´ÊÔÑ飬¸ù¾Ý¶ÀÁ¢Öظ´ÊÔÑéµÄ¸ÅÂʹ«Ê½Ð´³ö·Ö²¼ÁУ®
£¨2£©¸ù¾ÝÉÏÒ»ÎÊ×ö³öµÄXµÄ·Ö²¼ÁУ¬Ð´³öÆÚÍûµÄ±íʾʽ£¬×ö³ö½á¹û£¬¸ù¾ÝÒ»³¡ÊÕÈë»ñÈ¡ÊÕÒæ2 000ÍòÃÀÔª£¬µÃµ½×éÖ¯ÕßÊÕÒæµÄÊýѧÆÚÍû£®
½â´ð£º½â£º£¨1£©ËùÐè±ÈÈü³¡ÊýXÊÇËæ»ú±äÁ¿£¬ÆäËùÓпÉÄÜȡֵΪ4£¬5£¬6£¬7£¬
Á½¸ö¶ÓÔÚÿһ³¡±ÈÈüÖÐȡʤµÄ¸ÅÂÊÏàµÈ£¬
´Ó¶øP£¨X=k£©=
C
3
k-1
(
1
2
)k-1
£¬k=4£¬5£¬6£¬7£®
¡àXµÄ¸ÅÂÊ·Ö²¼Îª
 ¦Î     4      5    6     7
  P     
1
8
   
1
4
    
5
16
     
5
16
£¨2£©ËùÐè±ÈÈü³¡ÊýµÄÊýѧÆÚÍûÊÇE(X)=4¡Á
1
8
+5¡Á
1
4
+6¡Á
5
16
+7¡Á
5
16
=
93
16

×éÖ¯ÕßÊÕÒæµÄÊýѧÆÚÍûΪ
93
16
¡Á2000=11625ÍòÃÀÔª£®
µãÆÀ£º±¾Ì⿼²éÀëÉ¢ÐÍËæ»ú±äÁ¿µÄ·Ö²¼ÁкÍÆÚÍû£¬ÇóÀëÉ¢ÐÍËæ»ú±äÁ¿µÄ·Ö²¼ÁкÍÆÚÍûÊǽüÄêÀ´Àí¿Æ¸ß¿¼±Ø³öµÄÒ»¸öÎÊÌ⣬ÌâÄ¿×öÆðÀ´²»ÄÑ£¬ÔËËãÁ¿Ò²²»´ó£¬µ«ÊÇҪעÒâ½âÌâ¸ñʽ£®
Á·Ï°²áϵÁдð°¸
Ïà¹ØÌâÄ¿

Î¥·¨ºÍ²»Á¼ÐÅÏ¢¾Ù±¨µç»°£º027-86699610 ¾Ù±¨ÓÊÏ䣺58377363@163.com

¾«Ó¢¼Ò½ÌÍø