In an examination of 180 marks of a subject, 75% marks are allocated for theory and the rest for project work. Veena scored 60% in theory. What percentage of marks must she score in the project to achieve an overall 62% marks in the subject?

68

75% = \(\frac{3}{4}\) , 60% = \(\frac{3}{5}\) & 62% = \(\frac{31}{50}\) 

Total marks of subject = 180

Theory marks = \(\frac{3}{4}\) × 180 = 135

Practical marks = 180 - 135 = 45

Theory marks of Veena = \(\frac{3}{5}\) × 135 = 81

Total marks scored = \(\frac{31}{50}\) × 180 = 111.6

So , practical marks of Veena = 111.6 - 81 = 30.6

Percentage of practical marks  = \(\frac{30.6}{45}\) × 100 = 68%