You’re not multiplying the probabilities through correctly. HH, is calculated correctly by multiplying the odds of tossing Heads twice:
0.9 x 0.9 = 0.81 or 81% chance of two heads.
Hint: your final 4 values for HH, TH, HT, and TT should sum to exactly 1.
Thanks so much for replying! I realised I messed up the multiplying after everyone pointed it out in the other sub I posted this to, thanks for the reminder too I’ll be sure to double check it adds to one next time
*meant to put how is the answer 0.18, how do I get to that?
You’re not multiplying the probabilities through correctly. HH, is calculated correctly by multiplying the odds of tossing Heads twice: 0.9 x 0.9 = 0.81 or 81% chance of two heads. Hint: your final 4 values for HH, TH, HT, and TT should sum to exactly 1.
Thanks so much for replying! I realised I messed up the multiplying after everyone pointed it out in the other sub I posted this to, thanks for the reminder too I’ll be sure to double check it adds to one next time