Question

Class 10 of a school has 90 students. Following
percentage of marks secured by all the stud
(i) I student got above 90% marks
(ii) of the students got above 80% marks
less than 90% marks.
(iii) of the students got above 70% marks are
less than 80% marks.
(iv) 33 students got above 60% marks but less th
70% marks.
(v) And rest of the students secured above 55%
marks but less than 60% marks.
Find the number of students who got above 55%
marks but less than 60% marks.​

Answer 1

Answer: 29 students

Step-by-step explanation:

Total number of students of class 10: 90

Number of students who got above 90% marks= 1

Number of students who got above 80% marks but less than 90% marks= 1/15 * 90= 6

Number of students who got above 70% marks and less than 80% marks= 7/30 * 90= 21

Number of students who got above 60% marks but less than 70% marks= 33

Number of students who secured above 55% marks but less than 60% marks= 90 ( 1+6+21+33 )

= 90 - 61= 29

29 students secured above 55% marks but less than 60% marks.