Hello freinds... pls help me with this question.To check out this question,you can turn your mobile cause the pic is horizontal...
I really need to know the answer
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option 4 is answer for this sum
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Answer:
The possible 4 digit numbers formed by 7, 9, 1, 3 are:-
7913, 7193, 7391, 7319, 7139, 7931, 9713, 9731, 9137, 9173, 9317, 9371, 1793, 1739, 1973, 1937, 1397, 1379, 3791, 3719, 3917, 3971, 3197, 3179
7913 + 7193 + 7391 + 7319 + 7139 + 7931 + 9713 + 9731 + 9137 + 9173 + 9317 + 9371 + 1793 + 1739 + 1973 + 1937 + 1397 + 1379 + 3791 + 3719 + 3917 + 3971 + 3197 + 3179
= 133320
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