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Use arithmetic progression for this. We know sum of people who boardedjamesk486 wrote:A subway train made eleven stops on its route. If an average(arith mean) of 30 passagenters boarded at each of the first 9 stops and at each stop, begining with the 2nd, 5 fewer passengers boraded than at the previous stop, how many passengers boarded the train at the first stop?
A. 60
B. 50
C. 30
D. 20
E. 10
Solution:jamesk486 wrote: ↑Wed May 23, 2007 12:11 pmA subway train made eleven stops on its route. If an average(arith mean) of 30 passagenters boarded at each of the first 9 stops and at each stop, begining with the 2nd, 5 fewer passengers boraded than at the previous stop, how many passengers boarded the train at the first stop?
A. 60
B. 50
C. 30
D. 20
E. 10
