It can be very annoying when a screw is missing in the IKEA box you just brought home. Assume that in

any given IKEA box the probability that a screw is missing is

$1$

$\%$

$,$

$$independently of other boxes. Having

recently moved to a new city, Anna bought

$5$

$$new furniture at IKEA

$($

i

$.$

e

$.$

$$she brought home

$5$

$$IKEA boxes

$)$

$.$