11th maths Chapter 9 Exercise 9.3 intro + Example 15,16,17,18

Find the lower quartile, upper quartile and inter quartile range for the date: 9,11,15,19,17,13,7

Construct a frequency table for the following ages (in years) of 30 students using equal class intervals, one of them being 9-12, where 12 is not included. 18, 12, 7, 6, 11, 15, 21, 9, 8, 13, 15, 17, 22, 19, 14, 21, 23, 8, 12, 17, 15, 6, 18, 23, 22, 16, 9, 21, 11, 16.

The 5th term of an A.P. is 11 and the 9th term is 7. Find the 16th term.

Find the sum of the 4th term and 9th term of the A.P.. 3,8,13,18,.... .

Find the 15^(th) term of the series 3 - 6 +9 - 12 + …

Evaluate: 9.3 xx 18

The marks of 19 students in a test were as follows: 5, 6, 8, 9, 10, 11, 12, 13, 13, 14, 14, 15, 15, 15, 16, 16, 18, 19, 20. Calculate the median and mode.

For the distribution x_(i) given 18, 20, 9, 15, 21, 26, 14, 13, 27, 22, 16, 28 the 40th percentile is

Put these fractions in order from least to greatest : (9)/(17), (3)/(16),(19)/(20),(7)/(15)

If the 8th term of an A.P. is 31 and the 15th term is 16 more than the 11th term, find the A.P.