7. If the average of 8 observations is 5. If an observation 12 is removed, then the average of new set ofobservations is[ ]1) 102) 113) 128.The average of a class of twenty boys is 15 years. If eight boys of 18 years average join the class. Find[ ]the new average of the class1) 15.86 yrs2) 17 yrs3) 20 yrs4) 18.6 yrs

7. If the average of 8 observations is 5. If an observation 12 is re

1.	7. If the average of 8 observations is 5. If an observation 12 is removed, then the average of new set ofobservations is[ ]1) 102) 113) 128.The average of a class of twenty boys is 15 years. If eight boys of 18 years average join the class. Find[ ]the new average of the class1) 15.86 yrs2) 17 yrs3) 20 yrs4) 18.6 yrs
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