MATH 221 Week 3 Homework (v1) 2021

Document Content and Description Below

1. The access code for a car's security system consists of four digits. The first digit cannot be 1 and the last digit must be odd. How many different codes are available? The number of different co... des available is (Type a whole number.) 4500 . 2. A probability experiment consists of rolling a 6sided die. Find the probability of the event below. rolling a number less than 4 The probability is .5 . (Type an integer or decimal rounded to three decimal places as needed.) 3. Use the frequency distribution to the right, which shows the number of voters (in millions) according to age, to find the probability that a voter chosen at random is in the given age range. Ages of voters Frequency 18 to 20 8.1 21 to 24 11.1 25 to 34 20.8 not between 21 and 24 years old 35 to 44 23.7 45 to 64 51.2 65 and over 27.2 The probability is .922 . (Round to three decimal places as needed.) 4. Determine whether the following statement is true or false. If it is false, rewrite it as a true statement. If two events are independent, P(A|B) = P(B). Choose the correct answer below. A. False; if events A and B are independent, then P(A and B) = P(A) • P(B|A). B. True C. False; if events A and B are independent, then P(A and B) = P(A) • P(B). D. False; if events A and B are independent, then P(B|A) = P(A). [Show More]

Last updated: 1 year ago

Preview 1 out of 6 pages