There are 20 counters in a box. 6 of the counters are red.
5 of the counters are green.
The rest of the counters are blue.

Lethna takes at random one of the counters from the box.

Find the probability that she takes a blue counter.

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.