neelfa pester

. The mean of a , 5a, 9a is 15. The mean of a, 3a, 5a, 7a is
A.4 B.6 C.9 D. 12 E.15

1. The mean of 27 numbers is x. If each of 27 numbers is increased by 81 , the increase in the
   mean is
   A. 3 B. 9 C. 27 D. 81
   . 4 gallons : 6 quarts=……….
   A. 2:3 B. 8:3 C. 4:6 D. 3:8 E. None of these
2. 6600 feet : 2 miles =…………
   A. 8:5 B. 5:8 C. 33:1 D. 22:1 E.3300:1
3. If 1/2x+y=2x, then x:y=……….