A computer program selects blue, red, green as the background color each time the program is used. The program was used 45 times on the same computer in one week. Of those 45 times, a blue background appeared 12 times and a red background appeared 21 times.

Option b.

Step-by-step explanation:

Consider the below figure attached with this question.

A computer program selects blue,red,green as the background color each time the program is used.

Blue background = 12 times

Red background = 21 times

Green background = (45-12-21) times = 12 times

Blue background = Green background

Red background ≠ Green background

Green is just as likely as blue to appear, but not as likely as red.

Therefore, the correct option is b.

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step-by-step explanation: