A bag contains n counters One counter is blue and the rest are red. Two counters are taken at random from the bag. a Express, in terms of n, the probability that a counter of each colour is taken. Give your answer as a fraction in its simplest form. b The probability that a counter of each colour is taken is 0.125 How many red counters are in the bag?
Question
![A bag contains n counters One counter is blue and the rest are red. Two counters are taken at random from the bag. a Express, in terms of n, the probability that a counter of each colour is taken. Give your answer as a fraction in its simplest form. b The probability that a counter of each colour is taken is 0.125 How many red counters are in the bag?](https://redmondmathblog.com/photo/65009188e4a80.webp)