There are 6 black balls and 9 red balls in an urn. If 3 balls are drawn without replacement. What is the probability that exactly 1 black ball is drawn? Express your answe as a fraction or a decimal number rounded to decimal places

the law of definite proportions states samples of a compound will always contain the same proportion of elements by mass. in other words, a given compound will always contain the same elements in the same proportions by mass.the law of multiple proportions states when two elements combine with each other to form more than one compound, then the weights of one element that combine with a fixed weight of the other are in a ratio of small whole numbers.