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26^3. There are 26 possible letters, so that is why we multipy by 26. Because there are 4 positions, and the first is taken with "A", that only leaves 3 positions left. As there are 26 possible letters in each position, you multiply by 26 three times, or, 26 to the third power.
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How many different five-letter initials with none of the letters repeated can people have?
There are 26*25*24*23*22 = 7,893,600 sets of initials.
How many different two-letter initials with none of the letters repeated can people have?
26*25 = 650
If radio station call letters must begin with either K or W and must include either two or three additional letters how many different possibilities are there?
There are 36504 different possibilities.
How many different three-letter initials can people have?
first space filled with A-z this implies that n(first)=26.second space filled with all letters from a-z this implies that n(second)=26.third space filled with all letters from a-z this implies that n(third)=26.therefore by principle of counting26x26x26=17576
What is the formula of probability in math?
There is no single formula for probability, since there are many different aspects to probability.There is no single formula for probability, since there are many different aspects to probability.There is no single formula for probability, since there are many different aspects to probability.There is no single formula for probability, since there are many different aspects to probability.
