Study the following table and answer the questions.
Solution
In A, 40% of students scored above 60% marks, the number of them being equal to 1160. Hence, the total number of students is 2900.
In B, 30% of students scored above 60% marks, the number of them being equal to 1170. Hence, the total number of students is 3900.
In C, 50% of students scored above 60% marks, the number of them being equal to 1170. Hence, the total number of students is 2340.
In D, 15% of students scored above 60% marks, the number of them being equal to 1200. Hence, the total number of students is 8000.
In E, 40% of students scored above 60% marks, the number of them being equal to 1600. Hence, the total number of students is 4000.
The number of students scored less than or equal to 60% from A is 1740.
The number of students scored less than or equal to 60% from B is 2730.
The number of students scored less than or equal to 60% from C is 1170.
The number of students scored less than or equal to 60% from D is 6800.
The number of students scored less than or equal to 60% from A is 2400.
The sum of these numbers is 14840.
The average will be 14840/5=2986.
So, option B is the answer.
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