Remember that there are TWO prizes to aim for.
The experiment of paying out 40% and 10% has not really worked. I thought it would increase the overall prizes but this hasn't happened yet. What it has done is made it more time-consuming for me to find the earnings and then calculate the payouts. Therefore I am going back to fixed prizes and will increase them as earnings increase. One thing I may try is to use the Reward Distribution feature on chainBB and award the winner 40% of the next puzzle. You may comment if this is a good idea.
The Question
There are 21 balls in a bag. R of them are red, W of them are white, and B of them are blue. It is known that,
a) if we double the white balls, the probability of drawing one red ball is 1/28 less than the probability of drawing one red ball at the beginning,
and
b) if we remove all red balls, the probability of drawing one white ball is 1/18 more than the probability of drawing one white ball at the beginning.
Find R, W and B
The Prizes
To qualify you must upvote this post and write the answer in a comment.
To win First Prize you must include the answer and a valid method.
The First Prize will be 2 SBD.
The Second Prize will be 1 SBD, awarded to any other correct answer in the comments section, chosen at random after the post has expired.
Also remember that your upvote generates curation rewards for you and that 25% of all earnings are given to upvoters.
Prizes will be awarded after the 7 days have expired. Winners will be announced in the comments below after the draw.
The Prizes will increase with more participation and as the earnings increase.
The main thing is to enjoy the challenge and maybe learn something new.
Come and check out other challenges currently live!
Brainsteem Mathematics Challenges - Drawn Matches
Brainsteem Mathematics Challenges - Coloured Numbers
Brainsteem Compute #4 Prize Computational Maths Puzzle [Win 40% and 10% in SBD]
Brainsteem Compute #3 Prize Computational Maths Puzzle [Win 40% and 10% in SBD]
Brainsteem Mathematics Challenges - Upside Down Number
Brainsteem Mathematics Challenges - Digital Sum
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