5. Look at this series: 80, 10, 70, 15, 60, … What number should come next? A. 20 B. 25 C. 30 D. 50

In the given figure if l||m, what is the value of x. A. 60 B. 50 C. 45 D. 30

Find the mean deviation about the mean for the following data: Marks obtained , 10-20, 20-30, 30-40, 40-50, 50-60, 60-70, 70-80 Number of students, 2, 3, 8, 14, 8, 3, 2

Find the mean deviation about the mean for the following data: Marks obtained 10-20 20-30 30-40 40-50 50-60 60-70 70-80 Number of students 2 3 8 14 8 3 2

Consider the marks, out of 100, obtained by 51 students of a class in a test, given in Table 14.9. M a r k sN u m b e r\ o f\ S t u d e n t s0-10 5 10-20 10 20-30 4 30-40 6 40-50 7 50-60 3 60-70 2 70-80 2 80-90 3 90-100 9Tot a l 51 Draw a frequency polygon corresponding to this frequency distribution table.

Calculate the median from the following data: Marks below: 10 20 30 40 50 60 70 80 No. of students: 15 35 60 84 96 127 198 250

The mean weight of 9 items is 15. If one more item is added to the series the mean becomes 16. The value of 10th item is (a) 35 (b) 30 (c) 25 (d) 20

If four numbers in A.P. are such that their sum is 50 and the greatest number is 4 times the least, then the numbers are (a) 5, 10, 15, 20 (b) 4, 10, 16, 22 (c) 3, 7, 11, 15 (d) none of these

In Figure, if l||m , what is the value of x? (a) 60 (b) 50 (c) 45 (d) 30

Plot the points A(10 ,\ 50),\ B(15 ,\ 20),\ C\ (40 ,\ 10)a n d\ D\ (60 ,\ 80) on the graph paper.

Find the mean deviation from the mean of the following data: Classes:, 10-20, 20-30, 30-40, 40-50, 50-60, 60-70, 70-80 frequency, 2, 3, 8, 14, 8, 3, 2