Question

Two letters are selcted at random from the word " IDEAS". What is the probability of selecting 2 vowels?

Answer 1

number of ways to select 2 letters for the 4 letters in 'ideas' = 5C2 = (5*4)/2 = 10

Number of ways of selecting 2 vowels from the 3 vowels in this word = 3

so the answer to this is 3/10