SOLUTION: Little Lenny Leonardson has 2 red blocks, 3 blue blocks and 2 yellow blocks. in how many diff ways can he line up the blocks? How do you know when to use permutation OR combina

Algebra ->  Permutations -> SOLUTION: Little Lenny Leonardson has 2 red blocks, 3 blue blocks and 2 yellow blocks. in how many diff ways can he line up the blocks? How do you know when to use permutation OR combina      Log On


   

Question 386795: Little Lenny Leonardson has 2 red blocks, 3 blue blocks and 2 yellow blocks. in how many diff ways can he line up the blocks?
How do you know when to use permutation OR combinatorics?
Answer by sudhanshu_kmr(1152) About Me  (Show Source):
You can put this solution on YOUR website!

It is problem of permutation because here we have to arrange color blocks,


no. of ways to arrange m things where x, y, z.... objects are of similar =
m!/(x!*y!*z!....)


here 2 red , 3 blue and 2 yellow blocks are similar...
so, no. of ways = 7!/(2!*3!*2!)
= 210



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