Performance of 1800 students in grades has been shown in the following pie chart. How many more students have obtained grade B than those who have obtained grade C?

50 60 54 3

54

Difference in number of students obtained grade B & C = \(\frac{27}{100}\) × 1800 - \(\frac{24}{100}\) × 1800 = \(\frac{3}{100}\) × 1800 = 54