The question was asked: A swim club is designing a new pool to replace its old pool. The new pool would need to last for 10 years. Concrete shell would cost $100,000 and last for all 10 years. Vinyl would cost $75,000 but not guaranteed to last all 10 and has a 33% chance of breaking down. Repair of vinyl would cost $40,000 to extend life to the 10 year mark. Both options are acceptable, which minimizes their cost?