How many ways are there to choose a patotoe and two green vegetables form a choice of three potatoes and seven green vegetables

What is your attempt?

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Originally Posted by unknown008

what is your attempt?

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3*7*3

Why did you pick those numbers and multiply them this way?

Note that what you did is not fully right.

Quote:

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Originally Posted by Unknown008

Why did you pick those numbers and multiply them this way?

Note that what you did is not fully right.

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# of slots and items

That's not how you do it...

If I asked you to find the number of ways of picking 3 distinct tomatoes from a group of 10 tomatoes, how many ways are there to pick those 3 tomatoes?

Quote:

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Originally Posted by Unknown008

That's not how you do it...

If I asked you to find the number of ways of picking 3 distinct tomatoes from a group of 10 tomatoes, how many ways are there to pick those 3 tomatoes?

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Idk

I asked you to pick 3 tomatoes.

You therefore have 3 slots.

_ _ _

In the first slot, you can have one of the 10 tomatoes, effectively giving you 10 ways of picking the first tomato.

10 _ _

In the second slot, you now have only 9 tomatoes to pick from. Therefore, you have 9 ways of picking the second tomato.

10 9 _

With the same logic, you are left with 8 ways.

10 9 8

Total number of ways = 10*9*8 = 720 ways.

Can you try your question now?

Quote:

---

Originally Posted by Unknown008

I asked you to pick 3 tomatoes.

You therefore have 3 slots.

_ _ _

In the first slot, you can have one of the 10 tomatoes, effectively giving you 10 ways of picking the first tomato.

10 _ _

In the second slot, you now have only 9 tomatoes to pick from. Therefore, you have 9 ways of picking the second tomato.

10 9 _

With the same logic, you are left with 8 ways.

10 9 8

Total number of ways = 10*9*8 = 720 ways.

Can you try your question now?

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Got it ty its 126

Yup, that's it :)