The practical marks in Mathematics secured by 9 students are 16,13,11,x,12,10,16,15 and 14.If the mean of these marks is 14,find the value of x.

lf 2x-5 ge 16 , find the minimum value of x.

If the mean of 6,7,x,8,y,14 is 9 then

Among the number of students in a class 25 read physics.30 read chemistry and 20 read mathematics.If 12 read both physics and chemistry,15 read chemistry and mathematics,18 read physics and mathematics and 10 read all the three subjects find the number of students in the class.

20 students are getting 'letter marks' either in Mathematics or in Advanced Mathematics. If 12 of them get letter marks in Mathematics and 9 of them in both, how many of them get letter marks in Adv. Mathematics.

If the sum of the square of the zeroes of the quadratic polynomial x^2- 14x + p is equal to 100, find the value of p.

The absence of the students of class x for a continuous period of 15 days is as below:2,3,5,0,1,8,2,10,7,4,2,9,11,3,1 Find the median of the above data.

The Class X students of a secondary school in Krishinagar have been allotted a rectangular plot of land for their gardening activity.Sapling of Gulmohar are planted on the boundary at a distance of 1 m from each other.There is a triangular grassy lawn in the plot as shown in the Fig.7.14.The students are to sow seeds of flowering plants on the plot. (i)Talking A as origin,find the coordinates of the vertices of the triangle

Let A={9,10,11,12,13} and let f:A rarr N be defined by f(x)=the highest prime factor of n.Find the range of f.

If one zero of the polynomial (a^2 + 9)x^2 + 13x + 6a is reciprocal of the other, find the value of a .

In 10 boxes of oranges of equal quantities brought for sale the number of rotten oranges are as follows:15,8,10,6,12,11,4,7,3,9 Find the median of the above data.