When a driver enters the license bureau to have his license renewed, he spends, on average, 70 minutes in line, 4 minutes having his eyes tested, and 6 minutes to have his photograph taken. What is the percent value-added time? Assume time spent waiting offers no value.

12.5%

Step-by-step explanation:

Total time = 70 + 4 + 6 = 80 mins

% value- added time

= (4+6)/80 × 100

= 12.5%

0.16 or 16%

step-by-step explanation:

lets take a coin for example.

if you toss it twice, it has a 1/4 chance of landing on heads both times because 1/2 * 1/2 is 1/4.

with the cards, the chance of picking dog is 0.4. having two people pick one is like picking a card twice in a row. so 0.4 * 0.4 is 0.16, or 16%