A software company sets up m number of computer systems to finish an assignment in 17 days. If 4 computer systems crashed on the start of the second day, 4 more computer systems crashed on the start o

Question

A software company sets up m number of computer systems to finish an assignment in 17 days. If 4 computer systems crashed on the start of the second day, 4 more computer systems crashed on the start of the third day and so on, then it took 8 more days to finish the assignment. The value of m is equal to:

TestHub · Accepted Answer

​ 17 m = m + ( m − 4 ) + ( m − 4 × 2 ) … + … ( m − 4 × 24 ) 17 m = 25 m − 4 ( 1 + 2 … 24 ) 8 m = 2 4 ⋅ 24 ⋅ 25 ​ = 150 ​

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