关于SAT数学的一个问题,求牛人拯救A fitness center purchased a number of exercise machines :4 costing $1700 each,8 costing $1300 each,and x costing $1200 each,where x is a positive odd integer.if the median price for all the exercise mach
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关于SAT数学的一个问题,求牛人拯救A fitness center purchased a number of exercise machines :4 costing $1700 each,8 costing $1300 each,and x costing $1200 each,where x is a positive odd integer.if the median price for all the exercise mach
关于SAT数学的一个问题,求牛人拯救
A fitness center purchased a number of exercise machines :4 costing $1700 each,8 costing $1300 each,and x costing $1200 each,where x is a positive odd integer.if the median price for all the exercise machines purchased by the fitness center was $1300,what is the greatest possible value of x
关于SAT数学的一个问题,求牛人拯救A fitness center purchased a number of exercise machines :4 costing $1700 each,8 costing $1300 each,and x costing $1200 each,where x is a positive odd integer.if the median price for all the exercise mach
4+8>11
这道题的关键在median,也就是说中间的那个数.因为x是一个奇数,并且最中间的这个数字必须出现在1300里,所以最大的x是11.
如果是十一的话,总数为23,中间的第十一个数出现在1300 each里面,满足条件.
如果是十三的话,总数为25,中间的第十三个数出现在1200 each里面,不满足条件.
不知道你理解了么.