Answer:
The average number of pounds they bought was 30 pounds.
Explanation:
we know that
To find out the average number of pounds, add the total number of pounds for each boy and then divide by the number of boys.
so
![((30+40+10+40))/(4)=(120)/(4)=30\ pounds](https://img.qammunity.org/2020/formulas/mathematics/middle-school/eamdeo8heljn61u9uxicilyy3trl0sqbop.png)
therefore
The average number of pounds they bought was 30 pounds.