how many numbers with different digits each greater than 4000 can be formed from the digits 0,2,5,7,8?
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Answer:168
Step-by-step explanation: since greater than 4000 it can be 4digit Or 5 digit
Case1: since numbers starting with 5,7,8 are greater than 4000 we have a choice of 3 , then remaining 4 digits in hundreds place then 3 in tens place and 2 in unit place. Therefore 3*4*3*2=72
Case 2: here we can start with any digit so first comes 4 , then thousands place would be again remaining 4 then hundreds place 3 , tens place 2 and one's place 1. Therefore 4*4*3*2*1=96
Therefore the final answer is 72+96=168
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