A bag containing 2 ref checkers and 6 black checkers. a checker is selected kept out of the bag, and then another checker is selected. what is P(black,then red)?
1 Answer
May 16, 2018
Explanation:
#"probability is calculated using"#
#"total favourable outcomes"/"total possible outcomes"#
#"a favourable outcome is a black checker of which there are 6"#
#"total possible outcomes "=2+6=8#
#rArrP("black")=6/8=3/4#
#"favourable outcome is now a red of which there are 2"#
#"total possible outcomes "=2color(red)(+5)=7#
#rArrP("red")=2/7#
#rArrP("black/red")=3/4xx2/7=6/28=3/14#
