In the diagram above, ∠PRQ = 90°, ∠QPR = 30° and /PQ/ = 10 cm. Find y.

The bearing of two points Q and R from a point P are 030° and 120° respectively, lf /PQ/ = 12 m and /PR/ = 5 m, find the distance QR.

What is the mode of the numbers 8, 10, 9, 9, 10, 8, 11, 8, 10, 9, 8 and 14?

The mean of 20 observations in an experiment is 4, lf the observed largest value is 23, find the mean of the remaining observations.

Find the median of the following numbers 2.64, 2.50, 2.72, 2.91 and 2.35.