CBSE - Aptitude Mathematics

For any set of variables 1.arithmetic mean &gt; geometric mean &gt; harmonic mean 2.arithmetic mean &lt; geometric mean &lt; harmonic mean 3.arithmetic mean &gt; geometric mean &lt; harmonic mean 4.arithmetic mean &lt; geometric mean &gt; harmonic mean

An amount of money is to be distributed among A,B and C in the ratio of 3 : 1 : 5. The difference between B's and C's shares is Rs.3,600. What is the total of A's and B's shares? 1. Rs.5,400 2. Rs.3,600 3. Rs.2,700 4. Rs.1,800

Rs.18,480 invested on compound interest becomes Rs.64,000 after eight years and Rs.68,000 after 10 years. If invested for two years at the same rate of interest, it would fetch 1. Rs.21,428 2. Rs.20,892 3. Rs.20,045 4. Rs.19,635

If a is any matrix and B is a non-singular matrix, then : 1. P(AB) = P (A). P (B) 2. P (AB) = p (A) + P (B) 3. P (AB) = P (A) 4. None of these