X = 0.25×104 =26
y = 7 × 10 = 70
n = 70 × 0.8 = 56
(56+70-26)(56+70-26)
⇒(100)(100) = 100
× 100 = 7%
y = 7 × 10 = 70
n = 70 × 0.8 = 56
(56+70-26)(56+70-26)
⇒(100)(100) = 100
it takes one printer, working alone, 9 h longer to print a payroll than it takes a second printer. working together, the printer
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