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.
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 withELSE
(C) Interchanging lines 5 and 9
(D) Interchanging lines 7 and 11

Answers

Answer 1

The code segment to ensure a correct simulation of the experiment is by b. replacing line 9 with ELSE

What is IF-ELSE function?

IF function is a common function in many programming language to execute the code in specific condition.

ELSE function is also a common function in many programming language. The ELSE function can't be declared alone but this function is a pair of IF function.

The given code use the two IF function with parameter RANDOM(1,4). The computer will consider it as two different statement and will give two random number, first to first IF and second to second IF. And this will give the incorrect simulation result.

So, to make experiment have correct simulation result we must only have one RANDOM(1,4), to do that we will use IF-ELSE function.

You question is incomplete, but most probably your full question was

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: xCount xCount + 1

Line 8: }

Line 9: IF(RANDOM(1, 4) > 1)

Line 10: {

Line 11: yCount yCount + 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

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