20180712 13

Prepare a frequency table of the following ages (in years) of 30 students of class VIII in your school: 13,14,13,12,14,13,14,15,13,14,13,14,16,12,1413,14,15,16,13,14,13,12,17,13,12,13,13,13,14

If the mode of the data. 13,27,24,13,17,21,22,x ,13,17,is 17 then the value of x is-

Find the mode of the following data 10,5,20,25,10,13,17,13,22,13

12 14 17 13 8 14 21 13 4 ?

4/13 + 9/13 + 2/13 = ?/13

Show that the three lines with direction cosines 12/13,-3/13,-4/13,4/13,12/13,3/13,3/13,-4/13,12/13 are mutually perpendicular.

The value of 13C_7+13C_8+13C_9+13C_10+13C_11+13C_12+13C_13 is equal to

The greatest positive integer for which 13 ^(k)+1 is a factor of the sum 13^(71) + 13 ^(70) + 13 ^(69) +….+ 13+1

Add the following: 3/13 + 7/13 + 1/13