A bag contains 3 red marbles, 4 blue marbles and 5 yellow marbles.

In this experiment from the bag, you select a marble, record it and place it back into the bag.
You then select a second marble.

What is the probability that you draw 2 blue marbles?

1/9

Step-by-step explanation:

i may be wrong

you add all of them together

then 1/3 times 1/3

54 kilometers per hour

step-by-step explanation:

according to rules:

1 km = 1000 meter

which means that 1 meter = 1/1000 km

1 hour = 3600 second [ as 1 hour = 60 min = 60 *60 seconds ]

which means that 1 second = 1/3600 hour

therefore, 1 kilometer/hour =

thus to convert 15 meter per second to kilometer per hour, we multiply 15 to 3.6 kilometer/hour.

15 meter/second=   which is the required answer.