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Let’s check out your problem:
If you flip three fair coins, what is the
probability
that you'll get heads on the first two flips and tails on the last flip?
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Math Problems
Algebra 1
Outcomes of compound events
Full solution
Q.
If you flip three fair coins, what is the probability that you'll get heads on the first two flips and tails on the last flip?
Coin Outcomes:
Each coin has
2
2
2
possible outcomes, heads (H) or tails (T). So for three coins, the total number of outcomes is
2
×
2
×
2
2 \times 2 \times 2
2
×
2
×
2
.
Total Outcomes Calculation:
Calculating the total outcomes:
2
×
2
×
2
=
8
2 \times 2 \times 2 = 8
2
×
2
×
2
=
8
.
Specific Outcome:
We want the specific outcome
H
H
T
HHT
HH
T
. There's only one way to get this exact sequence.
Probability Calculation:
The probability of getting HHT is the number of ways to get
H
H
T
HHT
HH
T
divided by the total number of outcomes.
Final Probability:
Calculating the probability:
1
8
.
\frac{1}{8}.
8
1
.
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