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· case-3
Casework & Complementary · Complementary probability
AIME style
●●●○○ 6/10
~4 min
⏱ 0:00
A fair coin is flipped
4
4
4
times. The probability of at least two heads is
m
n
\tfrac{m}{n}
n
m
in lowest terms. What is
m
+
n
m + n
m
+
n
?
complementary
binomial-probability
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Hint 1 of 3
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