2006-09-28 12:10:27 · 5 answers · asked by red_red_downcast 1 in Science & Mathematics ➔ Mathematics
You just need to divide the number of heads by the total number of flips. That's 161 / (161 + 179) = 161/340 = 0.4735 = 47.35%.
2006-09-28 12:13:07 · answer #1 · answered by DavidK93 7 · 0⤊ 1⤋
definition of probability is # desired outcomes / # of trials.
in your question, the class tossed heads, 161 times and tails 179 times.
all you are missing is the total number of trials. you can find that by adding the number of tosses - heads and tails - together to get 340
so Pheads = 161/340 = 0.4735, Ptails = 179/340 = 0.5264
also notice that if you add the probabilities of Pheads and Ptails the total should be 1 (or very close because of rounding), a good way to check your work
Hope this helps.
Good luck.
2006-09-28 12:17:52 · answer #2 · answered by Mark B 2 · 0⤊ 0⤋
161 / (161+179) =161/340 = 47%
2006-09-28 12:14:32 · answer #3 · answered by Anonymous · 0⤊ 1⤋
161 / (161 + 179) = 0.4735 = 47%
2006-09-28 12:14:12 · answer #4 · answered by Anonymous · 0⤊ 1⤋
The odds of a fair toss on the next toss is 0.5, the same as any other toss.
2006-09-28 12:13:25 · answer #5 · answered by Joseph G 3 · 0⤊ 0⤋