Question

In a class the first mark was 67 and d the last was 32 and by mistake these were written as

76 and 23. The average mark of the class is :

1) decreases by 9 2) increases by 9 3) not changed

4) Not determined since the strength of the class is not specified. 5) None of these​

Answer 1

option 4 is correct answer

Answer 2

Answer:

5) none of these

Step-by-step explanation:

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