See picture for reply and solution steps.
X/28 = 5/7
x = 28 * 5 / 7
x = 20
answer
x = 20 ft
12 total letters...5 vowels and 7 consonants.
probability of 1st letter being a vowel is 5/12
after replacing ...
probability of 2nd letter being a vowel is 5/12
probability of both occurring is (5/12 * 5/12) = 25/144 <===
1/2 plus 1/3 is 5/6.
You have to find the common denominator
