According to one survey most sixth students pupil watched tv adout 3hours a day. how many hours a week would that be

If i have 20$ and i gave 5$ away how much i got

Including 6% sales tax, an inn charges $135.68 per night. find the inns nightly cost

Se tiene en una caja de canicas 10, 4 blancas y 6 negras ¿cual es la probabilidad que en 2 extracciones con reemplazo sean blancas? ¿cual es la probalidad que en 2 extracciones sin reemplazo sean negras?