Std-10 Most Imp Ch 13 Gseb L-14

L-12 to L-13

The marks obtained (out of 20) by 30 students of a class in a test are as follows: 14, 16, 15, 11, 15, 14, 13, 16, 8, 10, 7, 11, 18, 15, 14, 19, 20, 7, 10, 13, 12, 14, 15, 13, 16, 17, 14, 11, 10, 20. Prepare a frequency distribution table for the above data using class intervals of equal width in which one class interval is 4-8 (excluding 8 and including 4).

The isotope of carbon C^(14) has half lift 5730 years . If the ratio of C^(14) to C^(12) is 1.3 xx 10^(-13) in a wood sample then find activity of sample of 1 g of wood-

15, 32, 14, 30, 13, ?

List two most common STDs.

14 observations are 10, 11, 11, 12, 13, 14, 12, 13, 10, 12, 12, 14, 14 and 15. What is the median of the given observations?

If 'RAJU' is code as 11-12-13-14 and 'JUNK' is coded as 13-14-10-9 than what is the code for 'RANK'?