It is possible for a computer to pick up an erroneous signal that does not show up as an error on the screen. The error is called a silent error. A particular terminal is defective and when while using the system ' word processor', it introduces a silent paging error with probability 0.1. The word processor is used 20 times during a given week. The probabillity that no silent paging error occur

Options

A. `(0.9)^20`
B. `(0.09)^20`
C. `20(0.9)^20`
D. `20(0.09)^20`

Answer

A