Answer:
378 students
Step-by-step explanation:
There are 900 students in total.
58% said their favorite color was purple.
To find the percentage of blue, we find subtract 100% by the percentage of purple.
100% - 58% = 42%
42% said their favorite color was blue.
Now we find 42% of the 900 students
0.42 x 900 or 42% of 900 = 378
378 students favorite color was blue.