To handle Business practice Child's right What is the effect on

The material which practically does not exhibit elastic after effect is

Mention a practical application of Tyndall effect.

There are several tea cups in the kitchen, some with handles and the others without handles.The number of ways of selecting two cups without a handle and three with a handle is exactly 1200. What is the maximum possible number of cups in the kitchen ?

There are several tea cups in the kitchen, some with handle and the others without handles. The number of ways of selecting two cups without a handle and three with a handle is exactly 1200. What is the maximum possible number of cups in the kitchen?