It took James 1 3/4hrs to
travel a distance of 126
in his car. Calculate his speed

Assuming that 126 is expressed in miles (mi), the answer is 72 miles per hour.

Step-by-step explanation:

Speed is calculated using the following formula: distance/time.

Knowing that he travels 126 miles in 1 hour and 45 minutes, we obtain 126 miles divided by 1.75 = 72 mph.

Solution:

For the first marble chosen by the player1,  

The probability that the marble is red is 3/9=1/3

After that the second player chose without replacement, there are 8 marbles left, of which 6 are blue.  So the probability of the second one being red is 6/8 = 3/4.

Since the question is asking the probability of both events happening,

So we have to multiply the two probabilities.

So the answer is (1/3) * (3/4) = 1/4.