The following graph shows the data of the number of candidates that appeared and qualified for a competitive exam from the colleges A, B, C, D, E.

Based on the information, the difference between the percentage of students that qualified, from the colleges B and D is:

15

In case of B ,

Total appeared students = 560

Qualified students = 420

Percentage of Qualified students = \(\frac{420 }{560}\) × 100 = 75%

In case of D ,

Total appeared students = 480

Qualified students = 432

Percentage of Qualified students = \(\frac{432 }{480}\) × 100 = 90%

Difference in percentage of qualified  students from B and D = 90% - 75% = 15%