There are some baskets. The chances of picking a loaded basket and choosing a red coloured one is 0.2. For every 100 tries to pick one basket, 60 times a basket is either loaded or red in colour. What is the sum of the probabilities of choosing an empty basket and choosing not a red coloured one?

Apply the relevant identity from the chapter and substitute the values established in the previous step, keeping the original constraint in view.

Use the simplified expression to isolate the unknown, then plug the result back into the question setup to confirm the working is internally consistent.

Cross-check against a boundary or limiting case. Both the dimensional balance and the qualitative behaviour at the extreme should agree with the candidate answer.

Combine the steps above to identify the correct option. The remaining choices each fail at least one of the consistency, dimensional, or boundary checks.