There are 3 black and 7 white balls in the box, identical in touch. You draw 3 balls randomly. If you find 1 black ball among the drawn ones, you will win $1, if you find 2 black balls, you win $2 and you will win $10, if all 3 are black. What are the chances to win at least 1 buck?

Question

anonymous · Answer

whoever answers me I'll fan + medal

gudden · Answer

using probability 
no of black balls in the box upon total number of balls

i.e. 3 / 10 = 0.3