Selina Concise Class 6 Math Chapter 10 Sets Exercise 10A Solution

EXERCISE 10A

(1) State whether or not the following elements form a set; if not, give reason:

(i) The given objects do not form a set.

Reason: Some problems may be easy for one person but not so easy for others. Hence the given objects are not well-defined.

(ii) The given objects form a set.

(iii) The given objects form a set.

(iv) The given objects do not form a set.

Reason: Some boys are tall but not all boys are same height. Hence the given objects are not well defined.

(v) The given objects form a set.

(vi) The given objects do not form a set.

Reason: Some triangles difficult to draw for one person but not so difficult for others. Hence the given objects are not well-defined.

(vii) The given objects form a set.

(viii) The given objects do not form a set.

Reason: All fruits are tasty for one person but the fruits may not tasty for others. Hence the given objects are not well-defined.

(ix) The given objects do not form a set.

Reason: All the boys are not same clever. They can more clever any other boys. Hence the given objects are not well defined.

(x) The given objects do not form a set.

Reason: All the schools are not same good in Delhi. There could be better than any other school in Delhi. Hence the given objects are not well-defined.

(xi) The given objects form a set.

(xii) The given objects form a set.

(xiii) The given objects form a set.