Question
In an examination the average marks of Rohit is 60. If
he got 19 more marks in science and 26 more marks in maths then his average would have been 65. Find the total number of subjects he studied?Solution
Let total number of subjects be x. Then, => (60x + 26 + 19)/x = 65 => 60x + 26 + 19 = 65x => 5x = 45 => x = 9
The ratio of roots of the equation mx2 + nx + n = 0 is α/ β = a/b, then find the value of `sqrt(a/b)+sqrt(b/a)+sqrt(n/m)`
I. 2p2 + 5p + 2 = 0Â Â Â Â Â Â Â Â II. 2q2 + 11 q + 14 = 0
For which value of m, there is no solution to the equation -
a – b = 5
ma – 4b = 1
The length of a line segment A, B is 10 units. The coordinates of point A are(2,3) and the value of ordinate of point B is 5. Then find the value of abs...
The slope of the equation 24x+ 8y =56 is
The ratio of roots of an equation
ax²+bx+b = 0 is p : q
Then find, √p/√q + √q/√p + √p/√q ?
Find the area between the lines 18x +12y = 108, 9x  + 6y  = 27, x - axis and y -axis.Â
I. 8/(√x) + 6/(√x) = √x
II. y ³- (14)7/2 /(√y) = 0
The equations 6x + my + 18 = 0 and 9x + 21y + 27 = 0 have a unique solution. Which of the following statements is definitely true?
If in two linear equations ax + by = c and dx + ey = f and a/d = b/e = c/f then, which of the following is true about the two equations?
