Two forces 10N and 6N act in the directions 060° and 330° respectively. Find the x- component of their resultant.

Find the unit vector in the direction of the vector \(-12i + 5j\).

In computing the mean of 8 numbers, a boy mistakenly used 17 instead of 25 as one of the numbers and obtained 20 as the mean. Find the correct mean

Given that \(^{n}P_{r} = 90\) and \(^{n}C_{r} = 15\), find the value of r.

Which of the following is nor a measure of central tendency?