Median of a data , arranged in ascending order 7,10,15,x,y,27,30 is 17 and when one more observation 5 is added to the data, the median has become 18 . Find x and y.

The median of the following numbers arranged in descending order is 25. Find the value of x. 40, 38 , 35 , 2x+ 10, 2x+1 , 15 ,11,8,5.

The median of observation 11, 12, 14, 18, x + 2, x + 4, 30, 32, 35, 41 arranged in ascending order is 24. Find the values of x.

The equation of a travelling sound wave is y = 6.0 sin (600 t - 1.8 x) where y is measured in 10^-5m , t in second and x in metre. (a) Find the ratio of the displacement amplitude of the particles to the wavelength of the wave. (b) Find the ratio of the velocity amplitude of the particles to the wave speed.

Find the mean deviation about the median for the following data: 3, 9, 5, 3, 12, 10, 18, 4, 7, 19, 21.

find the solutions for the pairs of equation. and identify the solution 5x+3y=15and 5x+2y=10

Find the area bounded under the curve y=3x^2+6x+7 X-axis with the ordinates at x=5 and x=10.

Find the mean deviation about the median for the data 13, 17,16,14,11,13,10,16,11,18,12,17.