For the 4 letters, there are 12 discrete pairs of letters, but only 6 unique pairs.
FI, FS, FH (and the mirrors IF, SF, HF)
IS, IH (and the mirrors SI and HI)
SH (and the mirror HS)
The probability that a letter picked at random is not a vowel depends on the set of letters you are choosing from. In the English alphabet, there are 21 consonants and 5 vowels, so the probability of picking a consonant is 21/26 or approximately 0.808.
First letter can be either of 2 letters. For each of those . . .Second letter can be any one of 26. For each of those . . .Third letter can be any one of 26. For each of those . . .Fourth letter can be any one of 26.Total possibilities = (2 x 26 x 26 x 26) = 35,152.Note:Many radio stations have three-letter call signs instead of four, so 'blank' is justone more possibility for the fourth letter, and the total possible 3- or 4-lettercall signs is(2 x 26 x 26 x 27) = 36,504 .
Edward Keyboard
If the letter and digits can be repeated and numbers like 0xx, 00x, and 000 are allowed then we see that the First Letter can be picked in 26 ways Second Letter can be picked in 26 ways Third Letter can be picked in 26 ways First Digit can be picked in 10 ways Second Digit can be picked in 10 ways Third Digit can be picked in 10 ways So total number of unique licence plates subject to above suppositions is 26 x 26 x 26 x 10 x 10 x 10 = 17576000
the letter a
Unless it is a personally requested plate, the numbers and letters are randomly picked by the MVD to identify that particular vehicle.
What is the probability that the letter P is picked when a letter is picked at random from the word STUPID!
If the toppings are picked at random, then the answer is 9/14.
opted
We have 4 times C and 2 times V.Repetition is allowed.That sums up the possibilities:C^4*V^2 with C=21 and V=5= 4,862,025A fully random 6-letter-password would be almost 64 times stronger.A team of six students traveled to a mathematics competition by bicycle. On leaving, they distractedly picked up their six helmets at random (each choice of helmet is equally likely). What is the probability that exactly three of the students picked up the correct helmet?can you explain why? and show the work??
L. Frank Baum looked over and saw his filing cabinet with the letters O-Z on it.
V was picked for Vanadium's chemical symbol because it is easy to remember a symbol if it is the first letter of the element's name. Sometimes the symbol is the first letter of the element's name in Latin.