Chapter 1. Tutorial: General Rules of Probability - Independence

Problem Statement

{0.30, 0.35, 0.40, 0.45, 0.50}
{0.70, 0.65, 0.60, 0.55, 0.50}
rand(0,4)
0.5[4]
0.70, 0.65, 0.60, 0.55, 0.50[4]
{0.084, 0.078, 0.072, 0.066, 0.060}
0.084, 0.078, 0.072, 0.066, 0.060[4]
{0.126, 0.147, 0.168, 0.189, 0.21}
{0.874, 0.853, 0.832, 0.811, 0.79}
{0.084, 0.078, 0.072, 0.066, 0.06}
{0.916, 0.922, 0.928, 0.934, 0.94}
0.126, 0.147, 0.168, 0.189, 0.21[4]
0.874, 0.853, 0.832, 0.811, 0.79[4]
0.084, 0.078, 0.072, 0.066, 0.06[4]
0.916, 0.922, 0.928, 0.934, 0.94[4]
{80, 85, 90, 95}
rand(0,3)
90[2]
{0.072, 0.053, 0.034, 0.017}
{0.928, 0.947, 0.966, 0.983}
{0.415, 0.469, 0.535, 0.632}
{0.585, 0.531, 0.464, 0.368}
0.072, 0.053, 0.034, 0.017[2]
0.928, 0.947, 0.966, 0.983[2]
0.415, 0.469, 0.535, 0.632[2]
0.585, 0.531, 0.464, 0.368[2]
{0.30, 0.35, 0.40, 0.45, 0.50}
{0.70, 0.65, 0.60, 0.55, 0.50}
rand(0,4)
0.35[1]
0.70, 0.65, 0.60, 0.55, 0.50[1]
0.35[1]
{0.084, 0.078, 0.072, 0.066, 0.060}
0.084, 0.078, 0.072, 0.066, 0.060[1]
0.35[1]
{0.126, 0.147, 0.168, 0.189, 0.21}
{0.874, 0.853, 0.832, 0.811, 0.79}
{0.084, 0.078, 0.072, 0.066, 0.06}
{0.916, 0.922, 0.928, 0.934, 0.94}
0.126, 0.147, 0.168, 0.189, 0.21[1]
0.874, 0.853, 0.832, 0.811, 0.79[1]
0.084, 0.078, 0.072, 0.066, 0.06[1]
0.916, 0.922, 0.928, 0.934, 0.94[1]
{80, 85, 90, 95}
rand(0,3)
1[2]
{0.072, 0.053, 0.034, 0.017}
{0.928, 0.947, 0.966, 0.983}
{0.415, 0.469, 0.535, 0.632}
{0.585, 0.531, 0.464, 0.368}
0.072, 0.053, 0.034, 0.017[2]
0.928, 0.947, 0.966, 0.983[2]
0.415, 0.469, 0.535, 0.632[2]
0.585, 0.531, 0.464, 0.368[2]

Series circuits have the components on the same line and if any one fails, the entire circuit does not work (similar to old fashion Christmas lights). Consider the series circuit below with different colored lights. The probability that a bulb fails during the holiday season varies by color with P(failure for red) = 0.5 ; P(failure for green)=0.60; P(failure for blue) = 0.70. Each bulb fails independently of the other bulbs.

Step 1

questions

Question 1

The probability that the red bulb will last for the entire holiday season is _____.

Correct.
Incorrect.

Step 2

questions

Question 3

Hence the probability that the string will fail at some time during the holidays is:

A.
B.
C.
D.

Correct.
Incorrect.

Step 3

Parallel circuits (see below) arrange components so that even if one device fails, the others still work because a complete circuit can be made. These are often used for safety reasons.

Consider the parallel circuit above with different colored lights. The probability that a bulb fails during the holiday season varies by color with P(failure for red) = 0.35 ; P(failure for green)=0.60; P(failure for blue) = 0.70. Each bulb fails independently of the other bulbs.

questions

Question 5

The probability that the red bulb will last for the entire holiday season is _____.

Correct.
Incorrect.

Step 4

questions

Question 7

The probability that the string will fail at some time during the holidays is:

A.
B.
C.
D.

Correct.
Incorrect.