Answer:
6 of the shirts sewn were not sealed in a box
Explanation:
Here, we want to know the number of shirts sewn that were not sealed in a box
Now, if 7 is to be sewn on a shirt, the number of shirts made from 490 buttons will be 490/7 = 70
70 shirts were made
In a box we had 8, so the number of 8’s in 70 will be 8 remainder 6
So what this mean is that 6 of the shirts were not sealed in a box