How many 3 digit numbers can be formed from the digits 1,2,3,4,5,6,7 assuming that the repetition of the digits is allowed how many of them ate divisible by 5 and how many of them are >400 ?
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How many 3 digit numbers can be formed from the digits 1,2,3,4,5,6,7 assuming that the repetition of the digits is allowed how many of them ate divisible by 5 and how many of them are >400 ?
Plz answer
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divisible by 5 (means unit digit is 5)= 7×7×1 = 49
>400(means hundreds diGit is >3) = 4×7×7 = 196