A security agency assigns a two-digit code with distinct digits to each of its members using the digits 0,1,2,....,9 such that the first digit of the code is not zero.However the code printed on the badage can potentially creat confusion when read upside down.For example,the code 18 may appear as 81.How many codes are there for which no such confusion can arise? __________________
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ans is 71
Little Star
ans is 71
Little Star
ans is 71
Little Star
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yes ans is 71 n hw u solved it??
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yes d ans is 71 n hw u solved it??
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