Mathematics
If x, y and z are in continued proportion, prove that : x/y^2.z^2 + y/z^2.x^2 + z/x^2.y^2 = 1/x^3 + 1/y^3 + 1/z^3
Related Questions
The marks of 200 students in a test were recorded as follows :
Marks % No. of students 0-10 5 10-20 7 20-30 11 30-40 20 40-50 40 50-60 52 60-70 36 70-80 15 80-90 9 90-100 5 Using graph sheet draw ogive for the given data and use it to find the,
(a) median
(b) number of students who obtained more than 65% marks
(c) number of students who did not pass, if the pass percentage was 35.
In a T.V. show, a contestant opt for video call a friend life line to get an answer from three of his friends, named Amar, Akbar and Anthony. The question which he asks from one of his friends has four options. Find the probability that :
(a) Akbar is chosen for the call.
(b) Akbar couldn't give the correct answer.
The table given below shows the runs scored by a cricket team during the overs of a match.
Overs Runs scored 20-30 37 30-40 45 40-50 40 50-60 60 60-70 51 70-80 35 (a) Draw a histogram representing the above distribution.
(b) Estimate the modal runs scored.