The histogram below represents the Mathematics marks of the students.
Find the total number of students with total marks more than or equal to 40 and less than 70.
24
No. of students in marks interval 40-50 = 7
No. of students in marks interval 50-60 = 8
No. of students in marks interval 60-70 = 9
So, total no. of students having marks more than or equal to 40 and less than 70 = 7+8+9 = 24