@Test
    public void twoChancesAndedShouldBeMultiplied() {
        // 0.5 * 0.5 = 0.25
        Chance coinToss = new Chance(0.5);
        Chance coinToss2 = new Chance(0.5);
        assertEquals(coinToss.and(coinToss2), new Chance(0.25));

        // 0.2 * 0.5 = 0.1
        assertEquals(new Chance(0.2).and(new Chance(0.5)), new Chance(0.1));
    }