Here, the probabilities for success for the three teams are 0.9, 0.8 and 0.7, so the probability of failure for the three teams will be 0.1, 0.2 and 0.3.
We need to find the probability that all the teams fail, which can be calculated as: 0.1 * 0.2 * 0.3 = 0.0060 or 0.60%.
I hope my solution solves your query.