Inashoemart different sizes (in inches)of shoes sold in a week are, 7, 9, 10, 8,7, 9, 7, 9, 6, 3, 5, 5, 7, 10, 7, 8, 7, 9, 6,7,7,7, 10, 5, 4, 3, 5, 7, 8, 7, 9, 7, Which size of the shoes must be kept more in number for next week to sell? Give the reasons.

Answer

7