There is a bag filled with 4 blue, 3 red and 5 green marbles.
a marble is taken at random from the bag, the colour is noted and then it is replaced.
another marble is taken at random.
what is the probability of getting 2 greens?

The radius of the circle is 4 cm and the measure of the central angle is 90° the area of the sector with a central angle measuring 90° and radius of length 4 cm is vt cm the triangle in the sector is 4 cm the area of the triangle is v/cm² the area of the segment of the circle is (471 - ) cm?