1. A shopkeeper sells 10 toffees for a rupee, gaining thereby 20%. How many did he buy for a rupee?
A. 11 C. 15
B. 12 D. 13
2. If 2A=3B=4C, then A : B : C is
A. 2 : 3: 4 C. 6 : 4 : 3
B. 4 : 3 : 2 D. 3 : 4 : 6
3.Two numbers are in the ratio 3 : 5. 3 If each number is increased by 10, the ratio becomes 5 : 7. The numbers are
A. 3, 5 C. 15, 25
B. 12, 20 D. 18, 30
4. Median of x = {10, 2, 14, 5, 8, 16} is
B. 9 D. 11
5. Which one of the following properties is not satisfied by mean?
A. It is a simple measure
B. It is easy to compute
C. It is a stable measure
D. It is not affected by extreme values.
6. If L and S are the largest and smallest values of a data, then the range is measured by the formula
A. L + S C. S – L
B. L – S D. LS
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