Total number of computers at Grove High School at the end of 2005 is option (C) 191
What is Arithmetic progression?
An arithmetic progression or arithmetic sequence is a sequence of numbers such that the difference between the consecutive terms is constant.
Number of computer at 1997 = 31 laptops
Number of computers buying at each end of the year = 20
Total number of computers at 2005 is
n=a+(n-1)d
n=9 years
a= 31 laptops
d= 20 laptops
Total number of computer at 2005 = 31+(9-1)20 = 191 computers
Hence, total number of laptop computers at Grove High School at the end of 2005 is option (C) 191
Learn more about Arithmetic progression here
https://brainly.com/question/20385181
#SPJ2
