Wendy wanted to understand whether students at her school were in favor of an extended school day. she surveyed some students and displayed the results in the table below:
in favor opposed undecided
grade 9 4 7 7
grade 10 9 11 5
grade 11 12 13 5
grade 12 10 5 12
if the principal randomly selects a student in grade 12 from this survey, what is the probability that the student is in favor of extending the school day?
answers:
0.37
0.27
0.49
0.52