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AMO 2027 Grades 6-7 SET 5 - Self-study Question 6

AMO · AMO 2027 Grades 6-7 SET 5 - Self-study

Question 6

A stamp collecting club calculated that the average number of stamps in its members’ 10 collections was 88. However, it was discovered that 2 numbers in the calculations were entered incorrectly. The number 55 was entered as 75 and the number 78 as 88. What is the correct average number of stamps in the 10 collections?