SOLUTION: A coin is tossed 7 times. What is the probability that the number of heads obtained will be between 6 and 7 inclusive?

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Question 353626: A coin is tossed 7 times. What is the probability that the number of heads obtained will be between 6 and 7 inclusive?
Found 3 solutions by stanbon, Fombitz, ewatrrr:
Answer by stanbon(75887) About Me  (Show Source):
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A coin is tossed 7 times. What is the probability that the number of heads obtained will be between 6 and 7 inclusive?
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Binomial Problem with n = 7 , p = 1/2:
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P(6<= x <=7) = 1 - P(0<= x <=5) = = 1/16
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Cheers,
Stan H.
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Answer by Fombitz(32388) About Me  (Show Source):
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Here are the probabilities for each number of heads.
P%280%29=1%2A%280.5%29%5E%287-0%29%2A%280.5%29%5E0
P%281%29=7%2A%280.5%29%5E%287-1%29%2A%280.5%29%5E1
P%282%29=21%2A%280.5%29%5E%287-2%29%2A%280.5%29%5E2
P%283%29=35%2A%280.5%29%5E%287-3%29%2A%280.5%29%5E3
P%284%29=35%2A%280.5%29%5E%287-4%29%2A%280.5%29%5E4
P%285%29=21%2A%280.5%29%5E%287-5%29%2A%280.5%29%5E5
P%286%29=7%2A%280.5%29%5E%287-6%29%2A%280.5%29%5E6=0.0546875
P%287%29=1%2A%280.5%29%5E%287-7%29%2A%280.5%29%5E7=0.0078125
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P(6 or 7)=P%286%29%2BP%287%29=0.0625

Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
Hi
probability that the number of heads obtained will be between 6 and 7 inclusive
%28.5%29%5E7%2B+7C6%2A%28.5%29%5E6+%28.5%29%5E1=.0625