document.write( "Question 633992: A bag contains 3 red balls, 4 black balls and 5 green balls. One ball is picked up from the bag randomly. What is the probability of getting a red or a green ball?\r \n" );
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document.write( "Which answer is it?\r \n" );
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document.write( "a. 1/3\r \n" );
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document.write( "b. 2/3\r \n" );
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document.write( "c. 4/5\r \n" );
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document.write( "d. 6/7 \n" );
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