Ethan has a bag of marbles. He has a total of 15 marbles. 3 are red, 5 are blue and 7 are green. If Ethan randomly picks are marble what is the probability he will pick a red marble? 7/15

0.2

3/6

8/15

A3cm×3cm\greend{3\,\text{cm} \times 3\,\text{cm}} 3cm×3cm start color greend, 3, space, c, m, times, 3, space, c, m, end color greend rectangle sits inside a circle with radius of 4cm\blued{4\,\text{cm}} 4cm start color blued, 4, space, c, m, end color blued . what is the area of the shaded region? round your final answer to the nearest hundredth.