Q: in how many ways one can wear 3 rings on 5 finger?
Different rings or same rings? Different rings: 5*6*7 . 5 fingers to choose from, then once the 1st ring goes in, you have 6 positions to choose from, 4 of the remaining fingered and the two positions behind and in front of the 1st ring and so on.
Different rings or same rings? Different rings: 5*6*7 . 5 fingers to choose from, then once the 1st ring goes in, you have 6 positions to choose from, 4 of the remaining fingered and the two positions behind and in front of the 1st ring and so on.
different cases can be considered all rings go to same finger, two on same finger , all three in different fingers
miseera
(Stop 'Mad'aming me. I ain't Madam. .)
16041
If the 3 rings are different, we can select 3 places out of 15 in C(15,3) ways and then internally arrange the rings in 3! ways. So it comes to be C(15,3)*3! ways