Will An Extra Year At Community College Help Me Transfer To A Better UC If...?

In 2015, there were more Latino applicants (35,120) to the UC system than white applicants (25,699).
http://www.ucop.edu/institutional-research-academic-planning/_files/factsheets/2015/fall-2015-applications-table3.2.pdf

Out of those applicants, there were 18,280 Latino admits and 15,719 white admits.
http://www.ucop.edu/institutional-research-academic-planning/_files/factsheets/2015/fall-2015-admissions-table3.pdf

Out of those admits, there were 10,183 Latino matriculants and 7,654 white matriculants.
http://www.ucop.edu/institutional-research-academic-planning/_files/factsheets/2015/frosh_trsirs_table3.1.pdf

Note that California’s overall population has more Latino than (non-Latino) white people, though it is likely that the high school senior / college frosh age group is heavier with Latino people than the general population.