A jar contains 3 red marbles and 7 green marbles.If a marble is drawn from a jar at random,what is the probability that this marble is green?
Choose the correct answer:
A) 3/10
B) 7/10
C) 1
D) 4/10
E) 6/10
Total number of marbles = 7+3= 
<gadget id="calculator">7+3</gadget>
<output>10</output>
10   no. of green marbles= 7   probability of drawn a green marble= 7/10   Answer is 7/10
<result>B</result>
A jar contains 3 red marbles and 7 green marbles.If a marble is drawn from a jar at random,what is the probability that this marble is green?