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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 probability of drawing a Jack on the first draw and a heart on the second draw from a deck of 52 cards?

The probability of drawing a Jack on the first draw from a standard deck of cards is 4 in 52. The probability of drawing a heart on the second draw is 13 in 51 (if the Jack was not a heart) or 12 in 51 (if the Jack was a heart). Multiply these two probabilities together, and you get 52 in 2652, or about 0.01961 for the case of the Jack not being a heart, and 48 in 2651, or about 0.01811 for the case of the Jack being a heart.

How is math useful in daily life?

Math crops up in many ways

* - shopping, ensuring that the items you've picked up don't cost more than the amount of money you can afford; * - bus/train/plane timetables * - buying wallpaper/carpets * - cooking recipes

Are women more fertile after having a baby?

you are more fertile than other women after having a child.

The probability of an event happening is the ratio of the number of?

The ratio of the chance of that event happening divided by all possible events. Chance of rolling a 6 is 1 (only one side has a 6) divided by the 6 possible events.

What event occurs during the elongation stage?

mRNA passes through ribosomal subunits, tRNA deliver amino acids to the ribosomal binding site in the order specified by the mRNA, & peptide binds forms between the amino acids and the polypeptide chain grows

What is the probability of rolling a 1 a 2 a 4 a 5 or a 6 on a six sided dice?

1/6. Taking each number separately, you are designating one number you want to be rolled and there are six possible numbers. Therefore, the probability of rolling a 2, per se, is 1/6, or in ratio form 1:6.

When would we use surface area in everyday life?

Some examples:

  • when you work out how much paint you need to redecorate your house,
  • when you choose to hang your washing on the line to dry rather than leave it in a clump,
  • when you decide the minimum amount of spread you want on your toast.

Why is it important to understand probability?

it is important to understand probability you may lose a good chance of winning something if you dont get or use probability at that time

Is Maya software only useful for creative professionals?

MAYA is a pretty well done program that can be used for a lot of designing things...i use Maya to make unreal tournament 2004 models and it can be used for a plethora of other things

What is the water displacement for 4 marbles?

Marbles come in various sizes so this question cannot be answered without further information.

How do you number your rows in Excel?

To number your rows in Excel, put a '1' in the first row, for instance in cell a1, the formula '=a1+1' in the second row, and then copy that formula to each additional row you want to number. Be careful, though, as inserting and deleting rows will mess the sequence up, and you will need to fix it as needed.

Why is this distribution referred to as a geometric distribution?

The geometric distribution is:

Pr(X=k) = (1-p)k-1p for k = 1, 2 , 3 ...

A geometric series is a+ ar+ ar2, ... or ar+ ar2, ...

Now the sum of all probability values of k = Pr(X=1) + Pr(X = 2) + Pr(X = 3) ...

= p + p2+p3 ... is a geometric series with a = 1 and the value 1 subtracted from the series.

See related links.

A way to say do not disturb in 10 letters?

no disturb

or

go away plz

(im assuming spaces count as letters)

What is a probability of a sum of seven if you roll two dice?

The probability of a sum of seven if you roll two dice is 6/36 or 1/6. There are 6 ways to roll a 7; (6,1) (5,2) (4,3) (3,4) (2,5) & (1,6) and 36 possible outcomes.

What is a pharmacopoeia?

A pharmacopoeia is a book containing a list of medicinal drugs, and their descriptions of preparation and use.

Can the variance of a normally distributed random variable be negative?

No. The variance of any distribution is the sum of the squares of the deviation from the mean. Since the square of the deviation is essentially the square of the absolute value of the deviation, that means the variance is always positive, be the distribution normal, poisson, or other.