The mean of observations 18, 14, 15, 19, 15, a12, 15, 16 is 16. Find the value of a. Also, find the median and mode.

Find the values of: sin15^@

Find the value of ^(15)C_4

Find the value: |15-2|

Find the value: |15-2|

The median of the given data. 6, 8, 9, 15, x, x +1 , 21, 22, 25, 29 is 17.5. Find the value of x.

There are 10 observations arranged in ascending order as given below: 45, 47, 50, 52, x,x+2,60, 62, 63, 74. The median of these observations is 53.Find the value of x.Also find the mean and the mode of the data?

If the mean of 20, 18 ,13 ,12, x and 10 is 15, then find the value of x.

What is the mode of 19, 19, 15, 20, 25, 15, 20, 15?

Find the value of deteriminant. |(2,-4),(7,-15)|