Emmaline bought a new book for $12 with a coupon for 25% off, how much would it cost without the coupon

The zoo collects $9.60 for every 24 tickets sold. how much will be collected for 400 tickets?

The measures of the legs of a right triangle are 15m and 20m . what is the length of the hypotenuse

Fracisco's game involves 3 green, 2 yellow, 4 red, and 3 black marbles. if he randomly draws three marbles from the bag, without replacement, what is the probability that he will draw yellow, and then red, and then black? a)1/192 b)1/72 c)3/220 d)1/55