In a city school of 900 students, 38% of the students are on the honor roll, 54% have a part-time job, and 21% are on the honor roll and have a part-time job. What is the probability (rounded to the nearest whole percent) that a randomly selected student is on the honor roll, given that the student has a part-time job? (7 points)
a) 11%
b) 70%
c) 39%
d) 21%
