As per data shown in the following table, what is the percentage of students who got less than 50 marks?  Marks obtained   10 to 20   20 to 30   30 to 40   40 to 50   50 to 60   60 to 70   70 to 80   No of students 5 11 18 38 39 24 15

74% 48% 72% 38%

48%

Total number of students = 5 + 11 + 18 + 38 + 39 + 24 + 15 = `150 Number of students with less than 50 marks = 5 + 11 + 18 + 38 = 72 Required percentage = \(\frac{72}{150}\) × 100 = 48%