If 1/3 of the total number of marbles in the three bags listed in the table above are blue, how many marbles are there in bag Q? (A) 5 (B) 9 (C) 12 (D) 23 (E) 46 Correct Answer: B Full explanation coming soon. Send us a note if you’d like this added to the […]
The parallelogram shown has four sides of equal length. What is the ratio of the length of the shorter diagonal to the length of the longer diagonal? (A) 1/2 (B) 1/√2 (C) 1/2√2 (D) 1/√3 (E) 1/2√3 Correct Answer: D Full explanation coming soon. Send us a note if you’d like this added to the
A manufacturer makes and sells 2 products, P and Q. The revenue from the sale of each unit of P is $20.00 and the revenue from the sale of each unit of Q is $17.00. Last year the manufacturer sold twice as many units of Q as P. What was the manufacturer’s average (arithmetic mean)
For each student in a certain class, a teacher adjusted the student’s test score using the formula y = 0.8x + 20, where x is the student’s original test score and y is the student’s adjusted test score. If the standard deviation of the original test scores of the students in the class was 20,
Of the 150 houses in a certain development, 60 percent have air-conditioning, 50 percent have a sunporch, and 30 percent have a swimming pool. If 5 of the houses have all three of these amenities and 5 have none of them, how many of the houses have exactly two of these amenities? (A) 10 (B)
