Please explain these 4 doubts that I have, please!!!

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9. Find the number of ways 10 books can be arranged in a row if they are taken 2 at a time.* *Do not add any commas to your answer. ways. Use the following scenario and frequency table to answer the question. A member of the fine arts committee wants to know what events the citizens are attending most and whether people think they are expensive. They asks 60 citizens in a survey if they attended the concerts, the plays, or the art exhibits, and whether or not they were inexpensive. He obtained the following: Expensive Inexpensive Total Art Exhibits 9 3 12 Plays 13 17 30 Concerts 11 7 18 Total 33 27 60 Which of the following statements are true about this table of data? More than one answer may be correct; check all that apply. The statement " - attended plays and thought they were inexpensive" is an example of joint relative frequency. The statement " Among the 18 people who attended concerts, 7 people surveyed thought it was expensive" is an example of conditional relative frequency. This table is not an example of the principle of independence. O This table is an example of the principle of independence. O The statement " 27 co people surveyed thought their event was inexpensive" is an example of marginal relative frequency. ONone of these statements are correct.23. Find the odds in favor of getting all tails on seven coin tosses. O 1 to 124 O 1 to 127 O 1 to 135 O 1 to 122Use the following situation and probability table to answer the question. Kaia County Pool needs to figure out how many lifeguards they are going to need to hire for the upcoming summer season. They know they need 1 lifeguard per every 25 people at the pool. So, they look up the data from last year to find out how many people were at the pool on any given day last summer. The probability distribution table is shown below. Probability Distribution for the Number of Lifeguards Needed # of people 10 at the 1-25 26-50 51-75 76-100 101-125 126-150 151-175 176-200 pool 0 1 2 3 4 5 6 8 p(x) 0 0.08 0.10 0.06 0.10 0.16 0.16 0.26 0.08 Find each of the following probabilities: P(X = 7) P(X 2 6) P(X = 3 or 4)