How many numbers between 100 and 10000 can be formed with digits: 1, 2, 3, 0, 4, 5, 6, 7?
Answers
Answered by
0
Step-by-step explanation:
Total no. of 3 digit numbers formed=5×5×5=125
Total no. of 4 digit numbers =5×5×5×5=625
∴ Total numbers between 100 & 1000 formed =750.
Total number of 3 digit numbers without repetition=
5
P
3
No. of 4 digit numbers without repetition=
5
P
4
∴ No. of numbers between 100 & 1000 with at least one repeating digit=750−
5
P
3
−
5
P
4
Answered by
0
Answer:
1*2*3*4*5=120;
1*2*5^2*3*4=600;
1*2*3^2*4*5=360;
(1+2+4+5)^3=1728 AND MANY MORE.
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