Expected number of correct answers
Imagine that a student takes a 20-item multiple choice exam. She didn't study, so all of her answers are guesses. Each item on the exam has five possible answers. What is the expected number of correct answers?
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A committee of 8, consisting of 2 Republicans, 3 Democrats, and 3 Independents, is to be chosen from a group of 5 Republicans, 6 Democrats, and 4 Independents. How many different committees are possible?
Ann is a graduate economics student at State University. State University awarded her a $1,000 scholarship. In addition, Ann works as a half-time teaching assistant in the Economics Department at State University.
A Doppler speed meter operating at exactly 1.02 x 10^5 Hz emits sound waves in the direction of anoncoming baseball. The meter detects the reflected sound waves and measures a beat frequency of .30X10^5Hz. Determine the speed of the baseball
Two wires on a piano are the same length and are stretched to the same tension. Wire 1 vibrates at a frequency 1.5 times that of wire 2. Calculate the ratio of their masses (m1/m2).
Explain in one or two sentences, the key differences between the net income under Absorption and the net income under Variable costing. Determine the variable costing net income. Prepare a variable costing income statement.
How can standardized z-scores be used to compare people across different contexts, such as the batting averages of two players-one who played in the 1970s and one who played in the 1990s?
Discount-Mart issues $19 million in bonds on January 1, 2012. They have a nine-year term and pay interest semiannually. This is the partial bond amortization schedule for the bonds.
The average relative intensity of a person's voice is 58 dB. A microphone and amplification system increases the relative intensity to 70 dB. By what factor did the amplification system increase the sound intensity?
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