Show your work and explain.
2007-01-26 15:35:47 · 12 answers · asked by jrrkidd 1 in Science & Mathematics ➔ Mathematics
odds of getting heads on a nickel=0.5
odds of getting heads on a penney=0.5
odds of getting both=0.5*0.5=0.25 or 1 in 4
2007-01-26 15:40:28 · answer #1 · answered by yupchagee 7 · 14⤊ 0⤋
Assuming they're both fair coins, that's 1/4
Your sample space is
HH
HT
TH
TT
where the first letter indicates a head or tail on the nickel and the second letter indicates a head or tail on the penny.
Assuming the coins are fair, each of these outcomes is equally likely.
So there are 4 elements in the sample space and 1 element in the event of two heads.
Probability of an event = number of elements in the event divided by number of elements in the sample space
So that's 1/4
You can also get this probability by multiplying 1/2 x 1/2, but be careful here. this applies only if the events are independant. Fortunately, tossing coins is an independant experiemnt, However, sometimes events in an experiment are not independant. This is why I always recommend to begin by considering the sample space.
2007-01-26 15:40:45 · answer #2 · answered by Joni DaNerd 6 · 0⤊ 0⤋
The answer for each coin toss is ½. That means that once you get heads on the nickel, the chances of getting heads on the penny are also ½.
However, the chances of getting heads on both coins before you begin the coin tosses are ¼.
2007-01-26 16:11:56 · answer #3 · answered by Marv 2 · 0⤊ 0⤋
1/2 chance of heads for the nickel multiplied by the 1/2 chance of heads for the penny.
Complex Probability:
(Chance of Event 1 occurring) * (Chance of Event 2 occurring) = (Chance of Event 1 and 2 occurring)
1/2 x 1/2 = 1/4
1/4 chance of getting heads on both coins
2007-01-26 15:41:45 · answer #4 · answered by Anonymous · 0⤊ 0⤋
these two events are independant..they dont depend on each other
heads on nickel = 1/2
heads on penny = 1/2
combined prob = 1/2 * 1/2 = 1/4
2007-01-26 15:41:16 · answer #5 · answered by Anonymous · 0⤊ 0⤋
the probability of getting head on the nickel is 1/2
the probability of getting head on the peeny is 1/2
the perbability of getting head on both is .5*.5= .24 or 1/4
2007-01-26 15:45:30 · answer #6 · answered by 7 · 0⤊ 0⤋
The answer is still 50/50 because for example, If you filp one coin and it comes up heads, then if you flip the second coin, the odds are still the same that it will land on heads.
The odds are 1/2 or 50/50
2007-01-26 15:45:46 · answer #7 · answered by Anonymous · 0⤊ 0⤋
It's 2/8.
2007-01-26 15:43:07 · answer #8 · answered by Anonymous · 0⤊ 1⤋
I in 4. The possibilities are
heads (5) and heads (1)
heads(5) and tails (1)
tails (5) and tails (1)
tails (5) and heads (1)
2007-01-26 15:44:05 · answer #9 · answered by iraqisax 6 · 0⤊ 0⤋
1/2 * 1/2 = 1/4 = 0.25 is one quarter
2007-01-26 19:53:39 · answer #10 · answered by gjmb1960 7 · 0⤊ 0⤋