Answer:
Andre is right. Steps and explanation below.
Explanation:
total people = number of elementary students + adult teachers
= 280 + 40
= 320 people total
First type bus can hold 50 people
Second type can hold 56 people
if 3 for each types of buses are brought :
3 * 50 + 3 * 56 = 318 people.
Yes, this means Andre is right and can hold more 2 people extra.