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A class is divided into two sections A and B . Passing average of 20 students of section A is 80% and passing average of 30 students of section B is 70% . What is the passing average of both the sections ?

The average marks of the students in four sections A, B, C and D together is 60%. The average marks of the students of A, B, C and D individually are 45%, 50%, 72% and 80% respectively. If the average marks of the students of sections A and B together is 48% and that of the students of B and C together is 60%. What is the ratio of number of students in sections A and D?

The average marks of the students in four sections A, B, C and D together is 60%. The average marks of the students of A, B, C and D individually are 45%, 50%, 72% and 80% respectively. If the average marks of the students of sections A and B together is 48% and that of the students of B and C together is 60%. What is the ratio of number of students in section A and D?

The average score in Mathematics of 90 students of section A and B of class IX was 63. The number of student in A were 10 more than those in B. The average score of students in A was 30% more than that of students in B. The average score of students in B is :

The percentage of marks obtained by 10 students in the monthly unit tests are given below: Based on this data, a student is selected at random. Find the probability that the selected student obtains more than 70% marks in a unit test.

In a college out of 600 students, boys and girsl are in the ratio 8:7 Each students went to either physics lab or both, 40% of the boys attend only physisc lab, total 20% children went to both the labs out of which 25% are boys, 45% of the girsl went to only chemistry lab. Total number of students went to only physics lab is what percentage of the total number of students in the colelge