In how many ways can 5 identical balls be placed in 5 identical boxes such that there can be any number of balls in any of the box

A certain distance when is travelled at 3km/hr more than the usual speed ,the time taken to cover the distance would have been reduced by 2 hours than...

A certain distance when is travelled at 3km/hr more than the usual speed ,the time taken to cover the distance would have been reduced by 2 hours than...

A dishonest shopkeeper cheats at the time of purchasing by 20% and at the time of selling by 35% using wrong weights and sells at the cost price.find ...

Sir please reply to this puzzle.

sir i couldnt understand the unordered solution part,why did we subtract 3*6 and then divide by 6 ?

what is the sum of all the natural numbers frim 1-100 that are niether multiples of 2 nor a multiple of 5?