a student throws 3 coins in the air. Find the probability that exactly 2 landed on heads, given that at least 2 landed on heads.

a. 1/4

b. 1/2

c. 3/4

d. 1

A number (such as 0, 1, 2, 3, 4, 5, etc.) that is not a negative and is not a fraction what is it called?

Diana drew the scale drawing of her room as shown below. If 3 centimeters on the scale drawing equals 4 feet, what is the equal length of Diana room. length = 9 centimeters, width=6 cm

How many weeks are in 1 billion seconds

In the auditorium there are 43 red chairs and 26 blue chairs. What is the ratio of the number of red chairs to the number of blue chairs?

You choose a marble at random from a bag containing 8 brown marbles 6 yellow marbles and one purple marble. You replace the marble and then choose again. find p (both yellow)

What is the answer to 12 (4x+2)

Josephine was asked to make a one-fiftieth scale model of the new water tower for her town. She constructed the model that is shown below. The height is 2.25ft and 1.

Find the number of moles in 508 g of ethanol (C2H5OH).

If y=12 when x=9 find your when x=-4

Calling walk distance 15 miles in 6 hours work out average speed.