New SAT Math Workbook

# 2 3 1 25 and 09 5 6 2 the students of south high

This preview shows page 1. Sign up to view the full content.

This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: . Find the average amount contained in each of these cans. (A) \$6.14 (B) \$7.20 (C) \$6.26 (D) \$6.43 (E) \$5.82 The heights of the five starters on the Princeton basketball team are 6′ 6″, 6′ 7″, 6′ 9″, 6′ 11″, and 7′. Find the average height of these men. (A) (B) (C) (D) (E) 6′ 8 ″ 6′ 9 ″ 6′ 9 ″ 3 5 1 6′ 9 ″ 5 1 6′ 9 ″ 2 1 5 3. 7. .18 .32 20% 1 4 Andy received test grades of 75, 82, and 70 on three French tests. What grade must he earn on the fourth test to have an average of 80 on these four tests? (A) 90 (B) 93 (C) 94 (D) 89 (E) 96 The average of 2P, 3Q, and another number is S. Represent the third number in terms of P, Q, and S. (A) S – 2P – 3Q (B) S – 2P + 3Q (C) 3S – 2P + 3Q (D) 3S – 2P – 3Q (E) S + 2P – 3Q 8. 5. Which of the following statements is always true? I. The average of the first twenty odd integers is 10.5 II. The average of the first ten positive integers is 5. III. The average of the first 4 positive integers that end in 2 is 17. (A) I only (B) II only (C) III only (D) I and III only (E) I, II, and III www.petersons.com 110 Chapter 7 9. Karen drove 40 miles into the country at 40 miles per hour and returned home by bus at 20 miles per hour. What was her average rate in miles per hour for the round trip? (A) (B) (C) (D) (E) 30 1 2 2 26 3 25 10. Mindy’s average monthly salary for the first four months she worked was \$300. What must be her average monthly salary for each of the next 8 months so that her average monthly salary for the year is \$350? (A) \$400 (B) \$380 (C) \$390 (D) \$375 (E) \$370 20 27 1 3 www.petersons.com Averages 111 SOLUTIONS TO PRACTICE EXERCISES Diagnostic Test 1. (C) The integers are 2, 4, 6, 8, 10, 12, 14, 16, 18, 20. Since these are evenly spaced, the average is the average of the two middle numbers, 10 and 12, or 11. (B) These numbers are evenly spaced, so the average is the middle number x. (D) .09 = .3 1 = .5 2 .4 = .4 3) 1.2 .4 Exercise 1 1. (B) .49 = .7 3 = .75 4 80% = .80 3)2.25 .75 2. 3. 2. (D) The integers are 3, 1...
View Full Document

Ask a homework question - tutors are online