Two cards are randomly selected from an ordinary playing deck. what is the probability that they form a blackjack? that is, what is the probability that one of the cards is an ace and the other one is either a ten, a jack, a queen, or a king?

0.0483 or 4.83%

Step-by-step explanation:

Assuming that the order at which the cards are drawn is not important. There are 4 cards of each kind in a deck, that is, 4 aces and (4+4+4+4) kings, queens, jacks and tens.

The total number of ways to get a blackjack is:

The total number of ways to pick 2 cards out of 52 is:

The probability of getting a blackjack is:

x = -2

y = 848

step-by-step explanation:

plug in the numbers

option a is correct.

step-by-step explanation:

scale factor: it is used to find proportional measurements.

proportions means having the same ratio.

scale factor is the ratio of the model measurement to the actual measurement in a simplest form.

or we can say that the ratio of any two corresponding lengths in two similar geometric figures

if the scale factor is more than 1, then it is an enlargement,

if the scale factor less than 1, then it is a reduction.

given the two geometric figure:

by definition of proportions, we have