can someone show me the combinatorics steps to solve this problem ? I can solve it really easily by drawing a graph,
but my teacher said she would not allow us drawing and wants us to play with the combinatrics of probability to arrive at the answer, I've been trying to solve it a few times already but still cant
but my teacher said she would not allow us drawing and wants us to play with the combinatrics of probability to arrive at the answer, I've been trying to solve it a few times already but still cant
Attachments

818.8 KB Views: 12

242.8 KB Views: 1

131.6 KB Views: 4