Bag with 3 red marbles, 7 white marbles, and 5 blue marbles. You draw 3 marbles replacing one before drawing the next. What is the probability a red, blue and then white marble.

7/225

Step-by-step explanation:

There are 15 marbles in the bag. The probability of drawing a red marble is 3/15 = 1/5.  If you replace that marble, then the probability of drawing a blue marble is 5/15 = 1/3 and if you replace that marble, then the probability of drawing a white marble is 7/15.  Therefore, the probability of drawing a red, blue and white marble with replacement is (1/5)(1/3)(7/15) = 7/225

answer

explanation

the area of a circle is calculated using the formula

or

we can use any of the above formulae to calculate the required. preferably, let us use the latter since the diameter is

we substitute the diameter into the formula to get:

this is the exact value for the area of the circle.

the correct answer is a