One card is drawn from a deck of 20 cards numbered 1 through 20. find the probability of each scenario. (enter your probabilities as fractions.)

.

Step-by-step explanation:

Each scenario is the number of the card drawn. The number can be 1,2,3,4,...,20.

The probabilities of each number is uniform, that is, each number has the same probability of being drawn, since there are 20 cards, one with each number.

In all, the probability of a number being drawn is

.

step-by-step explanation:

d. bc = 12 and ef = 16

step-by-step explanation:

we are given that δabc : δdef such that .

also, it is given that

so, from the options, we need that .

a.

b.

c.  

d.

as, we can see that only option d gives the same ratio as i.e. .

hence, the possible lengths are bc = 12 and ef = 16.