Answer: 930 packages.
Explanation:
Large postcards come in packages of 20.
Small postcards come in packages of 25.
A store buys 24 packages of large postcards. The total packages will then be:
= 20 × 24 = 480
The store buys 18 packages of small postcards. The total package here will be:
= 18 × 25 = 450
Therefore, total packages bought will be:
= 480 + 450
= 930 packages