Final answer:
To transport 780 pupils, 12 buses are needed based on the given information that 2 buses can transport 130 people.
Step-by-step explanation:
To find the number of buses needed to transport 780 pupils, we can set up a proportion using the given information. If two buses can transport 130 people, then one bus can transport 130/2 = 65 people. Now we can set up the proportion:
2 buses / 130 people = x buses / 780 people
Cross-multiplying, we get 2 * 780 = 130 * x
Simplifying, we find that 1560 = 130x
Dividing both sides by 130, we get x = 12
Therefore, 12 buses are needed to transport 780 pupils.