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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 is the value of a 1983 D penny which has part of the tails side inverted stamped on the heads side?

This could be worth a couple hundred dollars, if genuine. You would need to have it examined by a professional (and probably certified), to determine if the error was something that happened at the mint, or if it is something that was done to the coin after it left the mint. There are alot of post-mint altered coins out there that are worthless. Try checking out the PCGS, NGC, or ANACS websites for details on how to get it examined and/or certified.

How are probability and statistics related?

Probability is the theoretical basis that underpins statistics.

In a standard deck of 52 playing cards what is the probability of not drawing an ace on one draw?

Probability of not drawing an ace equals one minus the probability of drawing an ace. The probability of drawing an ace is 4/52 or 1/13. So the probability of not drawing an ace on one draw is 1 - 1/13 or 12/13 or 0.9231 (92.31%).

What is the probability of the mean being greater than 78?

A very high probability if your numbers are greater than 78.

If 0.01 percent is in the fourth s.d. what percentage is in the fifth standard deviation from the mean of a normal distribution curve?

First, 0.01% is not in the fourth sd.

Prob(-4 < Z < 4) is approximately 0.0064 or 0.64% which, when rounded to 0.1% but is, in fact, smaller.

Prob(0 < Z < 5) is approximately 0.000 000 287 = 0.000 028 7%

Why is pascal's triangle named Pascal's triangle?

Mainly for Eurocentric reasons. The triangle was well known more than 1800 years before Pascal. In Iran it is known as the Khayyam triangle (Omar Khayyam , 11-12 century); in China, it is known as Yang Hui's triangle after the Chinese mathematician from the 13th century.

What is the probability of drawing an ace or two from a standard deck of 52 cards?

The probability of drawing an Ace or a Deuce from a standard deck of 52 cards is 8 in 52, or 2 in 13, or about 0.154.

What are the odds against both dice showing the same numberwhen you toss two dice at the same time?

The probability of both dice showing the same number is 1/6 and the probability of different numbers is 5/6.

How many red and black cards are in a deck of 52 cards?

Total :52

Red :26

Black :26

King :4

Queen:4

Jack :4

Joker :2

Number cards:40

How many possible hands are there for getting 3 Cards of the same suit and 2 random cards?

13 x 12 x 11 x 49 x 48

13 x 12 x 11 because there are 13 possible cards for any given suit, then 12 more of the same suit, then 11 more for the same suit.

At this point, you have 49 cards left, then 48.

So there are 4,036,032 possible hands like that.

What is the probability of rolling 12 with two dice?

there are many answers. you need to know how many sides are on the dice

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