QUESTION $8$

Cecil Boardh Mannfockuring has tested $200$ uniss of a prodoct. Alsr $2\mathrm{.}000$ hours, $4$ units have friled, the remainder functiceed for the full $4,000$ boers of the testing.

Whar is the number of thinures por unilbur?

A$.0\mathrm{.}0000305$ failuresfunithour

B$.0\mathrm{.}00000505$ falures$/$unie$-$hour

C$.0\mathrm{.}00000305$ fallureshunit$-$hour

$0\mathrm{.}0\mathrm{.}00505$ falureshunit hour