A researcher selects a probability sample of 100 out of the total population. It is

random sample

• The total number of students in a school was 660. The ratio between boys and girls was 13:9. After some days, 30 girls joined the school and some boys left the school and new ratio between boys and girls became 6: 5. The number of boys who left the school
• Rs.180 are to be divided among 66 persons ( men and women). The ratio of the total amount of money received by men and women is 5 : 4. But the ratio of the money received by each man and woman is 3: 2. The number of man is
• One year ago, the ratio between Mahesh’s and Suresh’s salaries was 3 : 5. The ratio of their individual salaries of last year and present year are 2 : 3 and 4 : 5 respectively. If their total salaries for the present year are Rs. 43000, what i
• Arunavo invested total sum of Rs. 16000 in two schemes (A and B) for two years. Scheme A offers compound interest (compounded annually) at the rate of 10% per annum and scheme B offers simple interest at the rate of 12% per annum. If the total interest ea
• Answer the questions given below based on the following data:A total of 250 students of a class play different games viz. Football, Hockey, Chess, Badminton, Table Tennis and Tennis. The ratio of girls to boys in the class of 250 is 13 : 12 respectively.