A complete cycle of a traffic light takes 60 s. During each cycle the light is green for 25 s, yellow for 5 s and red for 30 s. At a randomly chosen time, the probability that the light will not be green is

A complete cycle of a traffic light takes 60s. During each cycle the light is green for 25s, yellow for 5s and red for 30s. At a randomly chosen time, the probability that the light will not be green , is a) 1/3 b) 1/4 c) 4/12 d) 7/12

A traffic light runs repeatedly through the following cycle: green for 30 seconds,then yellow for 3 seconds,and then red for 30 seconds.Leah picks a random three-second time interval to watch the light.What is the probability that the colour changes while she is watching?

A glass jar contains 6 red, 5 green, 4 blue and 5 yellow marbles of same size. Hari takes out a marble from the jar at random. What is the probability that the chosen marble is of red colour?

The driver of a car travelling at 72 kmph observes the light 300 m ahead of him turning red. The traffic light is timed to remain red for 20 s before it turns green . If the motorist wisher to pass the light without stopping to wait for it t turn green , determine . The speed with which the motorist crosses the traffic light .

The driver of a car travelling at 72 kmph observes the light 300 m ahead of him turning red. The traffic light is timed to remain red for 20 s before it turns green . If the motorist wisher to pass the light without stopping to wait for it t turn green , determine . The required uniform acceleration of the car

The driver of a car travelling at 72 kmph observes the light 300 m ahead of him turning red. The traffic light is timed to remain red for 20 s before it turns green . If the motorist wisher to pass the light without stopping to wait for it t turn green , determine . The required uniform acceleration of the car

A car is stopped at a red traffic light. When the light turns to green, the car has a constant acceleration and crosses the 9.10 m intersection in 2.47 s. What is the magnitude of the car's acceleration ?