100 students are interviewed to see which of biology, chemistry or physics they prefer. 55 of the students are girls. 36 of the girls like biology best.
10 of the boys prefer physics.
7 out of the 21 who prefer chemistry are girls.
What percentage of the students prefer biology?

Ascientist has discovered an organism that produces five offspring exactly one hour after its own birth, and then goes on to live for one week without producing any additional offspring. each replicated organism also replicates at the same rate. at hour one, there is one organism. at hour two, there are five more organisms. how many total organisms are there at hour seven? 2,801 19,531 19,607 97.655