1.

Consider a,b,c,d,e,f,g,h to be eight distinct alphabets then the number of ways in which they can be dividied in 4- parts is

Answer»

`1260` if exactly 2-parts are equal
`1701`in total
`280` if its divided intotwo paritions of 3 and two of 1
`210` if all parts are equal

Solution :Total WAYS `=.^(8)C_(3)+.^(8)C_(4)xx.^(4)C_(2)+.^(8)C_(2)xx(.^(6)C_(3))/2+.^(8)C_(3)xx.^(5)C_(1)xx(.^(4)C_(2))/2+(|__8)/((2)^(4)|__4)`


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