0

# What is the probability of 1 out of 2 failing?

Updated: 10/23/2022

Wiki User

14y ago

Any time there are two options, heads or tails when you flip a coin for example, the probability is 1/2, that the result will be either one option, or the other. The expected result when the coin lands is a 1/2 probability that it will be heads, and a 1/2 probability that it will be tails. What "1 out of 2 failing" means is that for every two students that take an exam, for example, one of them will fail. Of course, it also means, that 1/2 will pass.

Wiki User

14y ago

Earn +20 pts
Q: What is the probability of 1 out of 2 failing?
Submit
Still have questions?
Related questions

### What is the probability of a missile guidance system with 7 fail-safe components with the probability of each failing being 2 assume the variable is binomial?

This question cannot be answered for two reasons.The questions states that "... the probability of each failing [is] 2 ...". That is not possible since probabilities can never be greater than 1.The question does not specify what even the probability is required for: the guidance system failing or not failing!

### 20 Lights wired in series. One fails they all fail. Each light has .02 probability of failing in 3 years. Lights fail independently of one another. What is the probability that string fails in 3 yrs?

P(one failing) = 0.02P(one not failing) = 1-0.02 = 0.98P(whole string NOT failing) = 0.9820P(whole string failing) = 1-P(whole string NOT failing) = 0.3324

### What is the probability that the a dice 2 is drawn if the two dice total is 5?

The probability, when the 2-dice total is 5, that one of the two dice shows a two is 1/2. The probability that that die is selected is 1/4.The probability, when the 2-dice total is 5, that one of the two dice shows a two is 1/2. The probability that that die is selected is 1/4.The probability, when the 2-dice total is 5, that one of the two dice shows a two is 1/2. The probability that that die is selected is 1/4.The probability, when the 2-dice total is 5, that one of the two dice shows a two is 1/2. The probability that that die is selected is 1/4.

### What is the probability that a 2 digit number is odd?

The probability is 1/2.

### What is the probablity of rolling a number greater than 2 on one roll of a die?

Let say the dice has n sides Let first search for the probability to roll a number less or equal to 2 Probability to roll a 1 = 1/n Probability to roll a 2 = 1/n Probability to roll a 1 OR a 2 = Probability to roll a 1 + Probability to roll a 2 = 1/n + 1/n = 2/n Probability to roll a number greater than 2 = 1 - (Probability to roll a 1 OR a 2) = 1 - 2/n = (n-2)/n If n = 6 then the result is (6-2)/6 = 4/6 = 2/3

### If you want to knock a marble off the table with 60 percent success 30 out of 50 shots make it what is the probability of knocking a marble out if you take two shots?

Seems like the probability for a single shot is 0.6 So the probability of success with shot 1 is 0.6 and the probability of failing with the first and winning with the second is 0.4x0.6=0.24, same for the other way around, and the probability if winning both times is 0.6x0.6=0.36, and the probability of failing both times is 0.4x0.4=0.16, which is the same as (1-2x.24-.36) Multiply the probability by 100 to get percent.

### What is the probability of getting zero tails?

The probability of getting zero tails is 1/2. The probability of getting zero tails twice in a row is 1/2 x 1/2 = 1/4. The probability of getting zero tails three times in a row is 1/2 x 1/2 x 1/2 = 1/8, etc... .

### What is the probability of getting tails on all 7 tosses if a fair coin is tossed 7 times?

The probability of Tails on the first toss is 1/2.The probability of Tails on the second toss is 1/2.The probability of Tails on the third toss is 1/2.The probability of Tails on the fourth toss is 1/2.The probability of Tails on the fifth toss is 1/2.The probability of Tails on the sixth toss is 1/2.The probability of Tails on the seventh toss is 1/2.The probability of all of them is (0.5 x 0.5 x 0.5 x 0.5 x 0.5 x 0.5 x 0.5) = (0.5)7 = 0.0078125= 0.78125 %

### What is the probability of drawing a heart or club from a pack of cards?

Probability of drawing a heart: 1/4 Probability of drawing a club: 1/4 Probability of drawing a heart or a club: 1/4 + 1/4 = 2/4 = 1/2

### A coin is tossed 4 times. What is the probability of getting tails 4 times in a row?

The probability to get tails once is 1/2 (for a fair coin) The probability to get tails twice = the probability to get it once x the probability to get it a second time The probability to get tails 4 times in a row is (1/2)4=1/16 The probability to get tails n times in a row is (1/2)n=1/2n The same thing is also true for heads (same probability: 1/2 each time)

### What is the probability of rolling 2 dice and getting 2 6s?

The probability is: 1/6 times 1/6 = 1/36

### What is the probability of having 3 baby girls in a row?

Assuming that the probability of having a baby girl is 1/2 and that of having a baby boy is 1/2, the probability of having 3 baby girls in a row is (1/2)(1/2)(1/2)=1/8.