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  • Let the digits a, b, c be in A.P. Nine-digit numbers are to be formed using each of these three digits thrice such that three consecutive digits are in A.P. at least once. How many such numb

Let the digits a, b, c be in A.P. Nine-digit numbers are to be formed using each of these three digits thrice such
that three consecutive digits are in A.P. at least once. How many such numbers can be formed?

Option: 1

1260


Option: 2

-


Option: 3

-


Option: 4

-


Answers (1)

best_answer

abc \ or \ cba\\ abc\\ cba\\ \\ \frac{{ }^7 C_1 \times 2 \times 6 !}{2 ! 2 ! 2 !}=1260

Posted by

himanshu.meshram

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