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Probability

The probability of a certain event is a number expressing the likelihood that a specific event will occur, expressed as the ratio of the number of actual occurrences to the number of possible occurrences. In mathematics, it is a measure of how often an event will happen and is the basis of statistics.

14,643 Questions

What are the odds of coin flip having the same results 8 times in a row?

1 in 27, or 1 in 128, or 0.0078125.

Note: the stated equation is 1 in 27, not 1 in 28, because the question said "same results 8 times in a row". If the question said "heads, 8 times in a row", then the answer would be 1 in 28, but since it said "same results", you have to consider that the second through the eighth flip must match the first flip, and that is 1 in 27.

What is the sample space for rolling a pair of dice?

The sample space is the following set:

{(1. 1), (1, 2), (1, 3), (1, 4), (1, 5), (1, 6),

(2. 1), (2, 2), (2, 3), (2, 4), (2, 5), (2, 6),

(3. 1), (3, 2), (3, 3), (3, 4), (3, 5), (3, 6),

(4. 1), (4, 2), (4, 3), (4, 4), (4, 5), (4, 6),

(5. 1), (5, 2), (5, 3), (5, 4), (5, 5), (5, 6),

(6. 1), (6, 2), (6, 3), (6, 4), (6, 5), (6, 6)}

What does contextual status mean?

status that aren't mutually exclusive. it refers to person who involve in multiple status. example: some women can be both mother and a businesswoman

What are the possible outcomes for the throw of 2 dice?

When two dies are thrown, there are 36 possible outcomes. The first number represents the outcome of the first die and the second number represents the outcome of the second die.

(1,1),(1,2),(1,3),(1,4),(1,5),(1,6)

(2,1),(2,2),(2,3),(2,4),(2,5),(2,6)

(3,1),(3,2),(3,3),(3,4),(3,5),(3,6)

(4,1),(4,2),(4,3),(4,4),(4,5),(4,6)

(5,1),(5,2),(5,3),(5,4),(5,5),(5,6)

(6,1),(6,2),(6,3),(6,4),(6,5),(6,6)

What is the probability that A date picked at random is February 30?

The probability that a date picked at random is February 30th is zero, as there is no February 30th, even in leap years.

How many different ways can five books be arranged on a shelf?

The number of permutations of five things taken five at a time is five factorial, or 120.

How are experimental probability and theoretical experiment alike?

They are both estimates of the probability of outcomes that are of interest. Experimental probabilities are derived by repeating the experiment a large number of times to arrive at these estimates whereas theoretical probabilities are estimates based on a mathematical model based on some assumptions.

What is mean by cardinality of sample space?

no of possibilities

for example tossind a fair coin then

the cardinality of sample space is 2

What is the probability of toss two heads with 2 pennies?

There are four different ways that two coins can land:

T T

T H

H T

H H.

Only one of them is two heads, so if the coins are fair, then

the probability is 1/4 = 25% .

Why is t score equal to z score in a normal distribution?

Because as the sample size increases the Student's t-distribution approaches the standard normal.

What is the probability of drawing an ace or a king?

There are 52 cards in a deck

there are 4 aces and 4 kings which makes a total of 8 kings and aces.

Assuming that the deck is full and shuffled the probability of drawing an aces or a king is 8/52 which simplifies to 2/13

How many different ways can you arrange 20 photos in an array?

Assuming that the arrays need to be rectangular, the answer is 14,597,412,049,059,800,000 or approx 15 quintillion.