The ticket price of Binhu Park is: 20 yuan per person; if you purchase 30 tickets at a time, you will be charged two yuan less for each ticket. I would like to ask: When the number of people is less than 30, what is the minimum number?

The poster is asking elementary school math questions! 30*(20-2)=540,540/20=27, 27+1=28.

Explanation: If a group buys 30 tickets, it costs 540 yuan. If the tickets are purchased at the original price, then the money can buy 27 tickets. (If there are 28 people, the original price will cost 560 yuan, which is obviously greater than 540.) Then For more than 27 people, it’s definitely a good deal to buy group tickets!