An A.P has 2k(k is natural) terms. The sum of first, third, upto 2k-1 terms is 186 and sum of other terms is 216.If last term is 55 more than the first term, find the FOURTH term.

If 12 balls are selected at random from box containing at infinite no. of white , red and black balls. Find the probality that such set contains exactly 6 white balls. (OA-if 1/13) plz explain approach...

If you take 12 balls,it must contain 0,or 1 or 12 white balls,but what we need is exactly 6 of them which would be one among the 13 possibilities..so 1/13

7\. There is a square field of side 500 m long each. It has a compound wall along its perimeter. At one
of its corners, a triangular area of the field is to be cordoned off by erecting a straight-line fence. The
compound wall and the fence will form its borders. If the length of the fence is 10...

7\. There is a square field of side 500 m long each. It has a compound wall along its perimeter. At one
of its corners, a triangular area of the field is to be cordoned off by erecting a straight-line fence. The
compound wall and the fence will form its borders. If the length of the fence is 10...

*Find the number of quadratic polynomials ax2 + bx + c such that: a) a, b, c are distinct. b) a, b, c E {1, 2, 3, ...2008} c) x + 1 divides ax2 + bx + c*
*a) 2013018 b) 2013021 c) 2014024 d) 2018040*

An equilateral triangle circumscribes three circles of radius 1 cm.....what is the perimeter of the equilateral triangle ??
Options 1) 6 ( Root 3 + 1) cm
2) Root3 (8 + root 2) cm
3) 15 ( root 3 - 1 ) cm

@rainbow54 Connect the centers of any two circles and each of the centers to the vertice close to it..Now find the longer of the parallel sides in the trapezium

An equilateral triangle circumscribes three circles of radius 1 cm.....what is the perimeter of the equilateral triangle ??
Options 1) 6 ( Root 3 + 1) cm
2) Root3 (8 + root 2) cm
3) 15 ( root 3 - 1 ) cm