There are 5 balls are in a bag; 2 are red balls and the other 3 are green balls. If 2 magazines are to be selected at random from the 5 balls, what is the probability that at least one of the green ball will be selected?  Choose the correct option: A) 11/10 B) 3/10 C) 5/10 D) 7/10 E) 9/10
Total probability=5C2=10   3C2 +3C1*2C1=3+6= 
<gadget id="calculator">3+6</gadget>
<output>9</output>
9   therefore the probability that at least one of the green ball will be selected= 9/10   answer is 9/10
<result>E</result>
There are 5 balls are in a bag; 2 are red balls and the other 3 are green balls. If 2 magazines are to be selected at random from the 5 balls, what is the probability that at least one of the green ball will be selected?