How many 4 digit words are possible by using English alphabet a to z with condition
one alphabet is not allow more than twice consecutively ex- "aaab", "cccc" not allowed
Total possible 4 digit character are = 26*26*26*26 = 456976
and 3 and 4 consecutive possible letters are = (26*2-1)*26 = 1326
so possible letters are 456976 - 1326 = 455650
There r few things whch we knw whch r nt capable of mathmatical reasoning nd when these can nt it is a sign dt our knowledge of them is very smal nd confusd nd where a mathmaticl reasing can be had . It is as dark a foly to make use a candle stick as to g
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Arithmetic is numbers you squeeze from your head to your hand to your pencil to your paper till you get the answer