The following histogram shows the marks scored by 40 students in a test of 30 marks. A student has to score a minimum of 10 marks to pass the test.

What is the percentage of students who scored 20 or more marks? (correct to one decimal place)

37.5%

Number of students with 20 or more marks = 10 + 5 = 15

Required percentage = \(\frac{15}{40}\) × 100

= 37.5%