A certain research group plans to create computer models of x% of a list of 10,000 bacterial species known to inhabit the human body. After a budget cut, the group finds it must reduce this selection by (x − 10)%. In terms of x, how many species of bacteria will the group be able to model? Choose the correct choice from the following options
A) x*x – 5x B) (x)(105 – x) C) (100)(105 – x) D) (100)(95 – x) E) (x)*(110 - x)
Initial: (x/100)*10000 = 100x (bacterial species)   After reduce BY (x - 10)%, the percentage of bacterial species = 1 - (x - 10)% = 1 - (x - 10)/100 = (110 - x)/100   Note: Difference between reduce to[means: the remain] and reduce by[means: the remain = 1 -reduce by]   So, the number of bacterial species after reducing: 100x*(110 - x)/100 = (x)*(110 - x)   Ans is (x)*(110 - x).
<result>E</result>
A certain research group plans to create computer models of x% of a list of 10,000 bacterial species known to inhabit the human body. After a budget cut, the group finds it must reduce this selection by (x − 10)%. In terms of x, how many species of bacteria will the group be able to model?