Of all the Harry Potter books purchased in a recent year, about 60% were purchased for readers 14 or older . If 12 Harry Potter fans who bought books that year are surveyed and if p 0.6, find the following probabilities: a. At least five of them are 14 or older. b. Exactly nine of them are 14 or older. c. Less than three of them are 14 or older.

Of all the Harry Potter books purchased in a recent year, about 60% were purchased for readers 14 or older . If 12 Harry Potter fans who bought books that year are surveyed and if p 0.6, find the following probabilities: a. At least five of them are 14 or older. b. Exactly nine of them are 14 or older. c. Less than three of them are 14 or older.

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

See similar textbooks

Similar questions

In a certain state, 31.3% of all community college students belong to ethnic minorities. Find the probabilities of the following results in a random sample of 10 of the community college students. a. Exactly 2 belong to an ethnic minority. b. Three or fewer belong to an ethnic minority. c. Exactly 5 do not belong to an ethnic minority. d. Six or more do not belong to an ethnic minority.
Given a deck of cards as the population. find the follow probabilities: P (Spades or Clubs) P (Even numbered cards) P (Face/King) P (Hearts/Black cards) P (Black/odd numbered cards) p (Red or seven) please show all work
A recent survey by a market research company found that 56% of all US households have internet access. Answer the following as decimals rounded to three places. a. If five households are chosen at random, what is the probability that all five have internet access? Preview b. What is the probability that none of the five have internet access? Preview c. If five households are chosen, what is the probability that at least one household has internet access? Preview
Consider a bowl containing 120 marbles: 20 green, 17 blue, 20 gray, 6 orange, 4 yellow, 22 cat eyes, and 31 multicolored. Suppose each marble has an equal chance of being picked from the bowl. Find the following probabilities. Round your answer to 4 decimal places. A.) P(Blue) B.) P(multicolored) C.) P(Green)
A box contains 3 red and 4 blue marbles. Two marbles are drawn at a time, without replacement. Use a probability tree to answer the following questions: a. Find the probability that both marbles drawn are red. b. Find the probability that the first marble drawn was blue, given that the second was red. Thank you!
A bag contains 9 red marbles, 5 white marbles, and 8 blue marbles. You draw 4 marbles out at random, without replacement. Find the following probabilities, and round to 4 decimal places.a. The probability that all the marbles are red is b.The probability that none of the marbles are red is .
Out of 2500 light bulbs that were tested, 135 were defective. Based on this information calculate the following probabilities. Enter your answers as a reduced fraction using / for the fraction bar. P(defective) = Answer P(not defective) = Answer S
Question 11: Find the probability that at least one of them gets off on the 5th floor. O .271 O .3 O .336
6. College Education and Business World Success R. H. Bruskin Associates Market Research found that 40% of Americans do not think that having a college education is important to succeed in the business world. If a random sample of five Americans is selected, find these probabilities. a. Exactly 2 people will agree with that statement. b. At least 3 people will agree with that statement.
One card is drawn from an ordinary deck of 52 cards. Find the probabilities of drawing the foliowing cards. a. A 2 or 4 b. A black card or a 9 c. A 10 or a black 7 d. A heart or a black card e. A face card or a diamond a. What is the probability that the card is either a 2 or a 4? (Simplify your answer. Type an integer or a fraction.)
16% of all Americans live in poverty. If 31 Americans are randomly selected, find the following probabilities. Round answers to 4 decimal places. a. Probability that exactly 4 of them live in poverty. b. Probability that at most 7 of them live in poverty. c. Probability that at least 5 of them live in poverty. d. Probability that between 1 and 6 (including 1 and 6) of them
i need part D