Final answer:
15% of the students do not have B's, which is 24 out of 160 students.
Step-by-step explanation:
If 85% of the students have B's, then the remaining students who do not have B's would be 100% - 85% = 15%. Since the total number of students is 160, we can calculate the number of students who do not have B's by finding 15% of 160. To do this, we multiply 160 by 0.15, which equals 24 students.
Therefore, 24 out of 160 students do not have B's, representing 15% of the total student population.