If repetition of numbers is not allowed then how many numbers of five digits can be formed by using 1,2,3,4,5. If 4 is necessarily taken at hundred's place and 2 is not allowed at unit's place
Ans :18 numbers of five digits can be formed. 01) 12435 02) 12453 03) 13425 04) 15423
05) 21435 06) 21453 07) 23415 08) 23451 09) 25413 10) 25431
11) 31425 12) 32415 13) 32451 14) 35421
15) 51423 16) 52413 17) 52431 18) 53421
answer=15120
How many numbers of five digits can be formed by using 1,2,3,4,5, if 4 is necessarily taken at hundred's place and 2 is not allowed at unit's place. Repetition of number is not allowed.
Let S be the set of all 5 digit numbers formed by the digits 1, 2, 3, 4, 5 without repetition. What is the sum of all numbers in S?
