How many 4 digit numbers can be formed using 7502 only once in a number
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Answer is 18
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Step-by-step explanation:
in this question we ask to calculate the the number of 4 digit numbers using 7502
for this at first
option for 1 place = 3
this is because you cannot use zero at first place
option for 2 place = 3
option for 3 place = 2
option for 4 place = 1
now 3×3×2×1 = 18
The answer is 18 .
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