Final answer:
The probability of selecting an 'R' from the word "UNNECESSARY" is 1/11, an 'E' is 2/11, an 'O' is 0 (since it's not in the word), and a 'C' is 1/11.
Step-by-step explanation:
The question involves finding the probability of selecting different letters from the word "UNNECESSARY". Probability is calculated by dividing the number of favorable outcomes by the total number of possible outcomes.
(a) To find the probability of selecting an 'R', we first count the total number of letters in "UNNECESSARY", which is 11. There is only 1 'R' in the word, so the probability is 1/11.
(b) There are 2 'E's in "UNNECESSARY", so the probability of selecting an 'E' is 2/11.
(c) Since there is no 'O' in the word, the probability of selecting an 'O' is 0/11 or simply 0.
(d) There is 1 'C' in "UNNECESSARY", so the probability of selecting a 'C' is also 1/11.