Q. The average of 16 numbers is 8. If 2 is added to every number, the new average will be -
1) 10
2) 8
3) 13
4) 9
Q. A, B, and C together can do a piece of work in 8 days. B and C together can do the same work in 12 days. But it was only A who started to do the work but fell ill after 18 days. The remaining part was finished by B and C working together in -
1) 3.6 days
2) 2.7 days
3) 3 days
4) 3.3 days
Q. The rate of simple interest per annum equivalent to 5% compound interest payable half yearly is -
1) 5.52%
2) 5.25%
3) 5.60%
4) 5.06%
Q. In a country, 80% of the population lives in villages. 90% of village people are farmers and 70% of farmers are landless. The percentage of the landless population is -
1) 50%
2) 50.4%
3) 80%
4) 60%
Q. The selling price of a book after a 20% discount is Rs. 48. The marked price (in Rs.) of the book is -
1) 166.66
2) 38.40
3) 40
4) 60
Q. Guns are fired at intervals of 5 minutes at a certain place towards which a train is approaching. A man in the train hears two successive firing sounds at intervals of 4 minutes 49 seconds. If sound travels at 1156 ft./ sec., the speed of the train miles per hour (given 1 mile = 5280 ft.) is -
1) 30
2) 15
3) 20
4) 25
Q. The marked price of a radio is Rs. 480 and the rate of discount is 15%. The amount of discount is -
1) Rs.65
2) Rs.60
3) Rs.75
4) Rs. 72
Q. The selling price of 1.0 articles is equal to the cost price of 8 articles. The loss percentage is -
1) 30
2) 15
3) 20
4) 25
Q. Two numbers are in the ratio 5 : 6 If 7 is added to both numbers, their ratio becomes 6 :7. The original numbers are -
1) 35, 42
2) 15, 18
3) 20, 24
4) 25, 30
Q. If the cardinality of a set A is 4 and that of a set B is 3, then what is the cardinality of the set A △ B?
1) 1
2) 5
3) 7
4) Cannot be determined as the sets A and B are not given