Answer:
D
Step-by-step explanation:
5 and 1/2 is not a whole nubmer in this list
ANSWER
The simplest form of the ratio

is

EXPLANATION
The ratio given to us is

We can divide each term in ratio by the same number.
To find the ratio in the simplest form we divide the terms in the ratio by their highest common factor, which is

This implies that,

We simplify this to obtain,

The correct answer is C.
Alternatively,


This implies that,
Answer:

Step-by-step explanation:
Subtract v from both sides

Simplify

Switch sides

Group like terms

Subtract the numbers: 2 - 42 = -40

Add 40 to both sides

Simplify

Divide both sides by 7

Simplify
➤ 
All socks together: 13
Black socks: 3
Probability to pick out black socks: 3/13
After one pick out (You picked out a pair of black socks):
Probability to pick out black socks: 2/12
Multiply them:
2/12 * 3/13 = 1/26 ≈ 0,038