Question

A letter is chosen at random from the letters in the word “PROBABILITY”. What is the probability that the letter will be a B or a vowel?

(a) \(\frac 5{11}\)

(b) \(\frac 6{11}\)

(c) \(\frac 2{11}\)

(d) \(\frac 7{11}\)

Answer 1

Correct option is (b) \(\frac 6{11}\)

Given letter is PROBABILITY

So, total letter is 11

no. of vowels = 4

no. of B = 2

Probability that the letter will be a B or a vowel is \(\frac 6{11}\).

Answer 2

two "B"s, and four vowels 

six favorable outcomes out of eleven possible outcomes

correct answer is: (b) 6/₁₁