How many different sequences of ten flips of a coin have at least 8 heads?
The number of ways that you can have 8 heads out of 10 flips, without caring about order is: 10C8.
The number of ways that you can have 9 heads out of 10 flips, without caring about order is: 10C9.
The number of ways tht you can have 10 heads out of 10 flips, without caring about order is: 10C10.
To find the number of ways to have at least 8 out of 10, add those three answers together.
The number of ways that you can have 8 heads out of 10 flips, without caring about order is: 10C8.
The number of ways that you can have 9 heads out of 10 flips, without caring about order is: 10C9.
The number of ways tht you can have 10 heads out of 10 flips, without caring about order is: 10C10.
To find the number of ways to have at least 8 out of 10, add those three answers together.