### 2 Answers

Relevance

- Uncle MichaelLv 71 month agoFavourite answer
1.

Out of the 11 letters, there are 2 letters of 'B'.

P(B) = 2/11

2.

Out of the 11 letters, there are 1 letter of 'P'.

P(P) = 1/11

3.

Out of the 11 letters, there are 1 letter of 'A' and 2 letters of 'I".

P(A or I) = P(A) + P(I) = (1/11) + (2/11) = 3/11

4.

P(not P) = 1 - P(P) = 1 - (1/11) = 10/11

- 1 month ago
There are ten letters in the word PROBABILITY. Some are repeated, B and I. The rest happen only once.

Imagine you have ten scrabble tiles with the ten letters on them, and you put them in a bag and shake them up and draw a tile without looking.

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