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 Calculate the probability of choosing an activity at random that burns more than 400 calories per hour.
 A . 3 out of 6
 B. 6 out of 3
 C. 6 out of 9
 D. 3 out of 9
 Activity
 Calories Burned Per Hour
 Basketball
 600
 Bike riding
 415
 Doing homework
 110
 Jumping rope
 678
 Running
 802
 Swimming
 600
 Tennis
 450
 Volleyball
 350
 Walking
 260