Posted by 3mmi3 on .
if peter has 60 basball cards in his collection how many baseball football and basketball cards does he have?
my answer was20 baseball cards
10 football cards
10 basketball cards

math (always) 
PsyDAG,
Insufficient data to answer. However, you already state he "has 60 baseball cards." On the other hand, if 60 is the total number, the three categories do not add up to the total.
Proofread you post for typos before you post it.