Answer:
21 vowels.....15 consonants.......added = 36 tiles
probability of first picking a consonant : 15/36 reduces to 5/12
replacing it...
probability that second pick is a vowel : 21/36
probability of both : 5/12 * 21/36 = 105 / 432 reduces to 35/144 <===
Step-by-step explanation:
The given statement can be represented as :
where, the number is assumed to be " b "
therefore, the correct choice is B. 2b³ - b
43,200