In a science experiment, result X is expected to occur 25% of the time and result Y is expected to occur the remaining 75% of the time. The following code segment is intended to simulate the experiment if there are 100 trials. Line 1: xCount 0 Line 2: yCount ← 0 Line 3: REPEAT 100 TIMES Line 4: { Line 5: IF(RANDOM (1, 4) = 1) Line 6: { Line 7: xCountxCount + 1 Line 8: } Line 9: IF(RANDOM (1, 4) > 1) Line 10: { Line 11: yCountyCount + 1 Line 12: } Line 13: } Line 14: DISPLAY ("Result X occurred") Line 15: DISPLAY (xCount) Line 16: DISPLAY ("times and result Y occurred") Line 17: DISPLAY (yCount) Line 18: DISPLAY("times.") A programmer runs the code segment, and the following message is displayed. Result X occurred 24 times and result Y occurred 70 times. The result shows that 94 trials were counted, rather than the intended 100 trials. Which of the following changes to the code segment will ensure a correct simulation of the experiment? A Replacing line 9 with IF (RANDOM (1, 4) ≥ 2) B Replacing line 9 with ELSE C Interchanging lines 5 and 9 D Interchanging lines 7 and 11
In a science experiment, result X is expected to occur 25% of the time and result Y is expected to occur the remaining 75% of the time. The following code segment is intended to simulate the experiment if there are 100 trials. Line 1: xCount 0 Line 2: yCount ← 0 Line 3: REPEAT 100 TIMES Line 4: { Line 5: IF(RANDOM (1, 4) = 1) Line 6: { Line 7: xCountxCount + 1 Line 8: } Line 9: IF(RANDOM (1, 4) > 1) Line 10: { Line 11: yCountyCount + 1 Line 12: } Line 13: } Line 14: DISPLAY ("Result X occurred") Line 15: DISPLAY (xCount) Line 16: DISPLAY ("times and result Y occurred") Line 17: DISPLAY (yCount) Line 18: DISPLAY("times.") A programmer runs the code segment, and the following message is displayed. Result X occurred 24 times and result Y occurred 70 times. The result shows that 94 trials were counted, rather than the intended 100 trials. Which of the following changes to the code segment will ensure a correct simulation of the experiment? A Replacing line 9 with IF (RANDOM (1, 4) ≥ 2) B Replacing line 9 with ELSE C Interchanging lines 5 and 9 D Interchanging lines 7 and 11
C++ for Engineers and Scientists
4th Edition
ISBN:9781133187844
Author:Bronson, Gary J.
Publisher:Bronson, Gary J.
Chapter5: Repetition Statements
Section5.5: A Closer Look: Loop Programming Techniques
Problem 14E
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