226. A survey showed that 63 % of the Americans like cheese whereas 76 % like apples. If x % of Americans like both cheese and apples, then find the range of x?
0 ≤ x ≤ 23 %
0 ≤ x ≤ 39 %
4 ≤ x ≤ 35 %
6 ≤ x ≤ 33 %
Correct answer: (B) 0 ≤ x ≤ 39 %
227. If x ≠ 1, and f(x) = x + 1 / x – 1 is a real function, then f(f(f(2))) is
1
2
3
4
Correct answer: (C) 3
228. If f(x) = + , then f(x) is
An odd function
An even function
Neither odd nor even
None of the above
Correct answer: (B) An even function
229. If A = {1, 2, 4} B = {2, 4, 5}, C = {2, 5} then (A – B) x (B – C)
{(1, 2), (1, 5), (2, 5) }
{(1, 4)}
(1, 4)
None of these.
Correct answer: (B) {(1, 4)}
230. Let R be a relation N define by x + 2y = 8 . The domain of R is