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The letters that form the word ALGEBRA are placed in a bowl. What is the probability, as a percent, of choosing a letter other than "A" and then choosing an "A"?

User TomGeo
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1 Answer

4 votes

Answer:

Explanation:

There are 7 letters in algebra. Two of them are "A"

The probability of choosing "A" on the first try is
(2)/(7)

Assuming you remove the letter after choosing it:

If you remove the A, then the second time around you have 6 letters with one of them being A

So, your chances of picking A is
(1)/(6)

Multiply the probabilities together.


(2)/(7) *(1)/(6) =(2)/(42) =(1)/(21)

Assuming you don't remove the letter after choosing it:

You have the same probability again,
(2)/(7)

Square the probability:


((2)/(7))^2 =(4)/(49)

User CosX
by
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