In a class the average mark in an exam is 70. The average of students who scored bellow 60 is 50. The average of students who scored 60 or more is 70. If the total number of students in this class is 20, how many students scored less than 60?

1. In a class the average mark in an exam is 70. The average of students who scored bellow 60 is 50. The average of students who scored 60 or more is 70. If the total number of students in this class is 20, how many students scored less than 60?

[EXIM Bank Officer(Cash)-2011 : 2011]

1. 4

2. 8

3. 10

4. 16

5. None of these

Answer

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