. 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
- 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 - 6600 feet : 2 miles =…………
A. 8:5 B. 5:8 C. 33:1 D. 22:1 E.3300:1 - If 1/2x+y=2x, then x:y=……….