Posted by Anonymous on .
1)A two-figure number is written down at random. Find the probability that
a)the number is greater than 44
b)the number is less than 100
2)A letter is picked at random from the english alphabet. Find the probability that
a)the letter is a vowel (my answer=5/26)
b)the letter comes in the first half of the alphabet (my answer=13/26)
c)the letter is one that appears in the word PROBABILITY
3)A letter is chosen at random from the letters of the word SUCCESSION. What is the probability that the letter is (a)N (b)S (c)vowel (d) not S
1. 10-99 are two digits # and that mean there are 99-10+1=90 possible numbers (and of course they're all less than 100). and so from 45-90, there are 46 numbers.
2. a and b looks right. There are 9 different letters in the word PROBABILITY so it should be 9/26.
3. Count the number of repeats in each letter within the word. For example, S repeats 3 times and the total letter is 10 thus the probably to draw an S from the word is 3/10... and so on for the rest of the problem.