# QUIZ 5 MATHS

1. Madan’s salary is 25% of Rani’s salary and Rani’s salary is 40% of Sudin’s salary. If the total salary of all the three for a month is Rs. 12000, how much did Madan earn that month?

1) Rs. 800            2) Rs. 8000          3) Rs. 600            4) Rs. 850            5) None of these

1. The average weight of 19 students was 25 kg. By the admission of a new student the average weight is reduced to 24.8 kg. The weight of the new student is

1) 24.8 kg            2) 20.8 kg            3) 20.6 kg            4) 21 kg               5) None of these

1. The average of 50 numbers is 38. If two numbers namely, 45 and 55 are discarded, the average of remaining numbers is:

1) 36.50                2) 37.00                3) 37.50                4) 37.52                5) None of these

1. A cricketer score 180 runs in the first test and 258 runs in the second. How many runs should he score in the third test so that his average score in the three tests would be 230 runs?

1) 219   2) 242   3) 334   4) None of these               5) None of these

1. The average salary of 20 workers in an office is Rs. 1900 per month. If the

manager’s salary is added, the average becomes Rs. 2000 per month the manager’s annual salary (in Rs.) is :

1) 24000              2) 25200              3) 45600              4) None of these               5) None of these

1. A class has 20 boys and 30 girls. The average age of boys is 12 years and that 10 girls is 11 years what is the average age of the whole class?

1) 11.4 years      2) 11.6 years                     3) 11.2 years                      4) 12 years                          5) None of these

1. The average height of 30 boys, out of a class of 50, is 160 cm. if the average height of the remaining boys is 165 cm, the average height of the whole class ( in cm ) is :

1) 161                   2) 162                   3) 163                   4) 164                   5) None of these

1. A group of 20 girls has average age of 12 years. Average age of first 12 from the same group is 13 years. What is the average age of other 8 girls in the group?

1) 10                      2) 11                      3) 11.5                   4) 10.5                 5) None of these

1. The average age of 30 students and the class teacher is 20 years. If the class

teacher’s age is excluded, the average reduces by 1 year. What is the age of the class teacher?

1) 39 years          2) 50 years          3) 40 years          4) 49 years          5) None of these

10.The average of Suresh’s marks in English and History is 55. His average of marks in English and Science is 65. What is the difference between the marks which he obtained in History and Science?

1) 40                      2) 60                      3) 20                      4) Data inadequate                         5) None of these