If AB= 4 units and DC=4 units , what is the length of BC?

answer 4

Step-by-step explanation:

if ab 4

dc 4

assuming a square bc 4

the expected value of the random variable : 0, 1 and 2

step-by-step explanation:

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%