sentence1: Calculate the average mark scored by Nancy if she obtained the following scores in an examination : less than 85 , 78 , 89 , 51 and 69 marks ( out of 100 ) in English Language , Physics , Mathematics , Chemistry and Biology ?
sentence2: Calculate the average mark scored by Nancy if she obtained the following scores in an examination : 65 , 78 , 89 , 51 and 69 marks ( out of 100 ) in English Language , Physics , Mathematics , Chemistry and Biology ?