Multiplication TableDiscrete Mathematics Level 2
Lila is on the process of memorizing the multiplication table. Now, she has memorized the table from rows 1-10 except rows 5, 7, and 8. Assuming that she has fully memorized all other rows, and she knows how the commutative property of multiplication works, then how many combinations left does she have to take note to fully memorize the \(10 \times10\) multiplication table?
\(1 \times 2\) and \(2 \times 1\) comprise one combination.