How many no between 1000 to 9900 in which four digits of number are different?
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anser is 4536
Number of 4 digit numbers having all different digits = 9*9*8*7 = 4536
smallest number : 1234, largest number : 9876, all are between 1000 and 9900.
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Number of 4 digit numbers having all different digits = 9*9*8*7 = 4536
smallest number : 1234, largest number : 9876, all are between 1000 and 9900.
mark a brainliest anser and comment thanks if u like
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