Isla flipped a coin 30 times. the coin landed heads up 9 times and tails up 21 times. part a: based on the results, what is the experimental probability of the coin landing heads up? show your work. (5 points) part b: what is the theoretical probability of the coin landing heads up? show your work

hello from mrbilldoesmath!

answer:

a(n) - a(n-1) -3

discussion:

this ones a bit interesting. given a(n) = 5 - 3n consider this:

a(n-1) = 5 - 3(n-1)

          = (5 - 3n) + 3             => but a(n) = 5 - 3n, the first term

          = a(n)   + 3                 => subtract 3 from both sides

a(n-1) -3 = a(n)  

or

a(n) - a(n-1) -3

you,

mrb