4)In an island there r tribals who speak lang of atmost 4 words.Lang consists of 4 alphabets.How many words can be formed in that language?
ya, their language has only 4 distinct alphabets say a,b,c,d.
Using all 4 we have,
$\displaystyle 4^4=256$
Using 3 we have,
$\displaystyle 4^4=64$
Using 2 we have,
$\displaystyle 4^2=16$
Using 1 we have,
$\displaystyle 4^1=4$
Thus, in total we have 340