Can someone please help me understand these 3 probability math problems.

Problem 1:  Option A, 1/8

Problem 2:  Option A, 1/12

Problem 3:  False

Step-by-step explanation:

Problem 1

Step 1:  Find the probability of landing on a red

Red → 1/4

Step 2:  Find the probability of landing on an A

A's → 3/6 → 1/2

Step 3:  Multiply to get the total probability

Red * A's

1/4 * 1/2

1/8

Option A, 1/8

Problem 2

Step 1:  Find the probability of landing on heads

Heads → 1/2

Step 2:  Find the probability of landing on a 5

Die → 1/6

Step 3:  Multiply to get the total probability

Heads * Die

1/2 * 1/6

1/12

Option A, 1/12

Problem 3

Step 1:  Find the probability of choosing a red or white marble

10 + 5 → 15

15 / 35

0.428...

 False

3< x< 5

step-by-step explanation:

|x - 4| < 1

there are two solutions, one positive and one negative.   remember to flip the inequality when taking the negative solution

x-4 < 1       x-4 > -1

add 4 to each side

x-4+4 < 1+4       x-4+4 > -1+4

x< 5                 x> 3

3< x< 5