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Count the possible combinations of 3 letters chosen from  A, B, C, D.The possible combinations of 3 letters are .

Question

Count the possible combinations of 3 letters chosen from  A, B, C, D.The possible combinations of 3 letters are .

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Solution

To calculate the number of combinations of 3 letters from A, B, C, D, we use the formula for combinations which is nCr = n! / r!(n-r)!.

Here, n is the total number of items to choose from, and r is the number of items to choose.

In this case, n = 4 (since we have 4 letters: A, B, C, D) and r = 3 (since we are choosing 3 letters).

So, the number of combinations is 4C3 = 4! / 3!(4-3)! = 4.

Therefore, there are 4 possible combinations of 3 letters chosen from A, B, C, D.

This problem has been solved

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