How many even two digit numbers are can be constructed out of the digits 3,4,5,6,7?Assume first that you may use the same digit again;then repeat the quesassuming that you may not use a digit more that once?
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Digits: 3,4,5,6,7
Smallest Even 2 digit no. = 2
Largest Even 2 digit no. = 98
Thus nos. will be b/t 2 and 98
where 2 and 98 don't include as there are no nos give:
The nos. are:
34,44,54,64,74 (4's series)
36,46,56,66,76 (6's series)
These are the only nos. as there are no even digit nos. left which we could use to make an even digit no which has the last digit even.
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