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A : the sum of all 4 digited number...

A : the sum of all 4 digited numbers that can can be formed using the digits the difits 1,2,4,5,6 without repetition is 479952
R :: Sum of all r digits numbers formed by taking the given n digits ( without zero ) is ( sum of all the n digits ) ` xx ""^(n-1) P_(r-1) xx (111 . . . r ` times ).

A

Both A and R are true and R is the correct explanation of A .

B

Both A and R are true but R is not correct exaplanation of A

C

A is true but R is false

D

A is false but R is true

Text Solution

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The correct Answer is:
A
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