If broad types and ages match then the probabilities will add adn the best type is named the broad type. E.g. If 1. Ia-norm -2 to 2; 2. Ia-91T 2 to 6; then the best type is Ia -2 to 6.
If broad types and ages match then the probabilities will add adn the best type is named the broad type. E.g. If 1. Ia-norm -2 to 2; 2. Ia-91T 2 to 6; then the best type is Ia -2 to 6.

daniel-muthukrishna/DASH