Question

The experimental probability of a coin landing on heads is 7/12. if the coin landed on tails 30 times, find the number of tosses.

Answer 1

Experimentally it landed on tails 5/12  tails/rolls=5/12 so if this continues how many rolls will it take to get 30 tails?

5/12=30/r

5r=12(30)

5r=360

r=72

72 rolls to get 30 tails