So I ask, did the friend do well in returning $10 to his friend or the returned $10 was not enough?
He do not want to lose then why did he gamble? Or let me say he do not want to lose 30% of the $190, then why did he gamble with the 30%. 30% of $190 is $57. He could have just gambled with $133 or lesser than that. If he won his friend, what tendency that he will even give the $10 back? No tendency. I will prefer not to gamble with a friend but if I did, I will not give him even 1 cent back.