Question

1£®Ä³ÖÐѧ×é֯ѧÉú²Î¼Ó¡°Éç»áÖ÷ÒåºËÐļÛÖµ¹Û֪ʶ¾ºÈü¡±£¬ÈüºóËæ»ú³é²éÁ˲¿·Ö²ÎÈüͬѧµÄ³É¼¨£¬ÕûÀí²¢ÖƳÉͼ±íÈçÏ£º

·ÖÊý¶Î	ƵÊý	ƵÂÊ
60¡Üx£¼70	30	0.1
70¡Üx£¼80	90
80¡Üx£¼90		0.4
90¡Üx£¼100	60	0.2

¸ù¾ÝÒÔÉÏͼ±íÐÅÏ¢£¬½â´ðÏÂÁÐÎÊÌ⣺
£¨1£©²¹È«ÆµÊý·Ö²¼±íºÍƵÊýÖ±·½Í¼£»
£¨2£©²ÎÈüµÄСÃ÷ͬѧÈÏΪËûµÄ±ÈÈü³É¼¨ÊÇËùÓвÎÈüͬѧ³É¼¨µÄÖÐλÊý£¬¾Ý´ËÍƶÏËûµÄ³É¼¨ÂäÔÚ80¡Üx£¼90·ÖÊý¶ÎÄÚ£»
£¨3£©Èç¹û¸ÃУ¹²ÓÐ2000ÃûѧÉú²ÎÈü£¬±ÈÈü³É¼¨80·ÖÒÔÉÏ£¨º¬80·Ö£©Îª¡°ÓÅÐ㡱£¬Çë¹À¼Æ¸ÃУ»ñµÃ¡°ÓÅÐ㡱µÈ¼¶µÄÈËÊý£®

Answer 1

·ÖÎö £¨1£©¸ù¾Ý¸÷×éµÄƵÂʵĺÍÊÇ1£¬ÓÃ1¼õÈ¥ÆäËü×éµÄƵÊý£¬¼´¿ÉÇóµÃ70¡Üx£¼80Ò»×éµÄƵÂÊ£¬¸ù¾ÝƵÂÊ=$\frac{ƵÊý}{×ÜÊý}$¼´¿ÉÇóµÃ×ÜÊý£¬È»ºóÀûÓù«Ê½ÇóµÃµÚÈý×éµÄƵÊý£»
£¨2£©¸ù¾ÝÖÐλÊýµÄ¶¨Òå¼´¿ÉÅжϣ»
£¨3£©ÀûÓÃ×ÜÈËÊý³ËÒÔ¶ÔÓ¦µÄƵÂʼ´¿É£®

½â´ð ½â£º£¨1£©70¡Üx£¼80¶ÎµÄƵÊýÊÇ1-0.2-0.4-0.1=0.3£®×ÜÈËÊýÊÇ30¡Â0.1=300£¨ÈË£©£¬80¡Üx£¼90¶ÎµÄƵÊýÊÇ300¡Á0.4=120£¨ÈË£©£¬

·ÖÊý¶Î	ƵÊý	ƵÂÊ
60¡Üx£¼70	30	0.1
70¡Üx£¼80	90	0.3
80¡Üx£¼90	120	0.4
90¡Üx£¼100	60	0.2

£¨2£©¹²ÓÐ300¸öÊý¾Ý£¬ÖÐλÊýΪµÚ150¸öÊý¾ÝºÍµÚ151¸öÊý¾ÝµÄƽ¾ùÊý£¬ÕâÁ½¸öÊý¶¼ÔÚ80¡Üx£¼90ÕâÒ»×飮¹Ê´ð°¸ÊÇ80¡Üx£¼90£»
£¨3£©¸ù¾ÝÌâÒâµÃ2000¡Á£¨0.4+0.2£©=1200£¨Ãû£©£®´ð£º¸ÃУ»ñµÃ¡°ÓÅÐ㡱µÈ¼¶µÄÈËÊýÊÇ1200Ãû£®

µãÆÀ ±¾Ì⿼²é¶ÁƵÊý·Ö²¼Ö±·½Í¼µÄÄÜÁ¦ºÍÀûÓÃͳ¼Æͼ»ñÈ¡ÐÅÏ¢µÄÄÜÁ¦£»ÀûÓÃͳ¼Æͼ»ñÈ¡ÐÅϢʱ£¬±ØÐëÈÏÕæ¹Û²ì¡¢·ÖÎö¡¢Ñо¿Í³¼Æͼ£¬²ÅÄÜ×÷³öÕýÈ·µÄÅжϺͽâ¾öÎÊÌ⣮