Answer
2.
From the table, we have the following:
Total boys' shoes measured = 6 + 5 + 8 + 7 + 9 = 35
Total girls' shoes measured = 4 + 4 + 9 + 5 + 7 = 29
Since 35 - 29 = 6
Therefore there are 6 fewer girls' shoes than boys' shoes
3.
5 more boys measuring 21 centimeters means, 5 will be added to the 7 boys' shoes that were 21 centimeters in length given.
That is 5 + 7 = 12
Hence, the table will change as follows:
21 centimeters boys' shoes length will change from 7 to 12
Also, the total boys' shoes measured will change from 35 to 40