Question 871999
1) 26 out of 52 cards are black. {{{P(B)=26/52=1/2}}}
2) Three coins flips gives 2^3 or 8 possible outcomes. All heads is one of those outcomes. {{{P(HHH)=1/8}}}
3) There are 6 numbers on the die. One of them is a 4. {{{P(4)=1/6}}}