Answer: 1350 envelopes
Explanation:
From the question, Leon packs thirty business envelopes in each of twenty-five boxes. The total business envelopes here will be:
= 30 × 25
= 750
Leon picked thirty regular envelopes in each of twenty boxes. The total regular envelopes will be:
= 30 × 20
= 600
Total envelopes will now be:
= 750 + 600
= 1350 envelopes