1. L6 Teacher's Notes Topic: Probability What other questions could you answer ? Eg p(A or E) = 0.21 p(I or O or U) = 0.18 etc What other questions could you answer? EgWhat is the probability you will get the word IOU ? (in that order) What about TOO, TU, TA, OO, TEA etc ? (a) What is the probability that it will not choose a vowel ? Vowel Probability AEIOU 0.080.130.070.080.03 A computer is going to choose a letter at random from an English book. The table shows the probability of the computer choosing each vowel. Vowels (b) The probability that the computer will choose the letter T is 0.09 The computer chooses a letter at random, and then another, and then another. What is the probability that these letters will be E, then A, then T ?

2. Vowels A computer is going to choose a letter at random from an English book. The table shows the probability of the computer choosing each vowel. Vowel Probability AEIOU 0.080.130.070.080.03 (a) What is the probability that it will not choose a vowel ?

3. Vowel Probability AEIOU 0.080.130.070.080.03 (b) The probability that the computer will choose the letter T is 0.09 The computer chooses a letter at random, and then another, and then another. What is the probability that these letters will be E, then A, then T ?