Question

4. There are 130 students in grade one, 210 students in grade two and 290 students in grade three in a primary

school, and so on in an arithmetic sequence. What's the total amount of students in the primary school? (Primary
School has 6 grades)

Answer 1

The total amount of students in the primary school is 1,980.

Explanation:

130, 210, 290, ......

210 - 130 = 80

The difference between each grade is 80 students.

(g = grade)

g1 = 130, g2 = 210, g3 = 290, g4 = 370, g5 = 450, g6 = 530

130+210+290+370+450+530 = 1980

Answer 2

well jus subtract

Step-by-step explanation\

think about it