A coin is tossed four times. What is the prob. of obtaining at least three heads?

Zain

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Apr 17, 2018
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A coin is tossed four times. What is the probability of obtaining at least three heads?

thank you in advance.
 
You probably should check the forum guidelines.

Please show your work. You can't have nothing.

Contemplate \(\displaystyle (a+b)^{4}\)
 
A coin is tossed four times. What is the probability of obtaining at least three heads?

thank you in advance.

The solution has to be expressed in different ways, depending on what you have learned. That's part of the reason we require you to show some work: so we can see what kind of work you know about. We want to guide you toward a solution that you are capable of working out yourself.

Do you know about the binomial distribution?

Do you know that the problem is asking for the probability that you get either 3 or 4 heads?

Can you use a tree to list the possible outcomes?

What have you learned about probability?
 
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