Q. 2 In how many ways we can make a 7 digit number such that :
(i) Digit '0' is not used & no. is divisible by 3.
(ii)No. starts with '5' OR ends with '5' .
(iii) Repetition is allowed & digit '7' is used exactly once
PLZZ give a detailed explanation.
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3 third one is right answer i think so
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