Q6. If |x| denotes the absolute value of x, then the values of x for which |3x-6|<9 holds, satisfy:
(a) -1 < x < 5
(b) x > -1 or x < 5
(c) x > 5
(d) x < -1
Q7. A number consists of two digits whose sum is 15. If 9 is added to the number, then the digits change their places. The number is:
Q8. Two numbers are in the ratio 3 : 5. If 9 be subtracted from each, then they are in the ratio of 12 : 23. The second number is:
Q11. If the mean of 4 observations is 20 and when a constant C is added to each observation, the mean becomes 22, the value of C is:
Q12. In a class of 100 students, the mean marks obtained in a subject is 30 and in another class of 50 students the mean marks obtained in the same subject is 60. The mean marks obtained by the students of two classes taken together is:
Q13. By selling an article for Rs 72, there is a loss of 10%. In order to gain 5%. Its selling price should be?
(a) Rs. 80
(b) Rs. 84
(c) Rs. 90
(d) Rs. 95
Q14. Due to 15% reduction in price of Sugar, a family is able to buy 3 KG more for Rs. 340. What is the reduced price of Sugar per KG?
Q15. After getting 2 successive discount on a shirt with a list price of Rs 350 is available at Rs. 245. If the second discount is 12.5%. Find out the first discount?