For two matrices to be equal, they must have the same size and both must be diagonal matrices. both must be square matrices. have equal corresponding elements. have opposite corresponding elements.

For two matrices to be equal, two conditions must be met:

1) They must have the same order. This means the number of rows and columns of the two matrices must be the same

2) All the corresponding elements must be same. This means each element of all the rows and columns must be the same.

So, the answer to the above question is:
For two matrices to be equal, they must have the same size and have equal corresponding elements. 

Well if you have 20 bats you probably want 20 balls? you don’t have enough context to answer the question.