Question : The average marks of 72 students are shown as 69. It includes a wrong entry of 45 marks instead of 54 marks. The correct average is:

Option 1: 68.875 marks

Option 2: 69.125 marks

Option 3: 68.625 marks

Option 4: 69.375 marks

Question : The average of the marks of 17 students in an examination was calculated as 71. However, it was later found that the mark of one student had been wrongly entered as 65 instead of 56 and another as 24 instead of 50. The correct average is:

Option 1: 70

Option 2: 71

Option 3: 72

Option 4: 73

Question : The average mark obtained by a class of 60 students is 65. The average marks of half of the students were found to be 85. The average marks of the remaining students are:

Option 1: 35

Option 2: 45

Option 3: 55

Option 4: 65

Question : The average mark obtained by a class of 60 students is 65. The average marks of half of the students were found to be 85. The average marks of the remaining students are:

Option 1: 35

Option 2: 45

Option 3: 55

Option 4: 65

Question : The average mark of 50 students in an examination was 65. It was later found that the marks of one student had been wrongly entered as 83 instead of 38. The correct average is:

Option 1: 63.9

Option 2: 64.5

Option 3: 64.7

Option 4: 64.1

Question : College P has 180 students scoring average marks of 88 and college Q has 320 students scoring average marks of 72. Find the average marks of both colleges together.

Option 1: 82.00

Option 2: 75.25

Option 3: 77.76

Option 4: 80.00