there were 4 computers and person were more then 4. so he decided to make a lucky draw whosoever win will have one computer...permissible ?

1) In our company we had a old computers so our boss decided to give to the employees freely. But there were 4 computers and person were more then 4. so he decided to make a lucky draw whosoever win will have one computer. so is this type of lucky draw is permissible. 2). In most of superstore they make a offer that if you buy above some money you will get coupon and on particular day we will open a lucky draw of that coupon and whosoever win will have a gift is this permissible. thanks and jazakumullaho khair