If the points (1, 1), (- 1, - 1), are the vertices of a triangle, then this triangle is
a right-angled triangle
an isosceles triangle
an equilateral triangle
None of the above
The point of intersection of the lines and is
(2, 10, 4)
(21, 5/3, 10/3)
(5, 7, - 2)
(- 3, 3, 6)
The distance between the point (1, - 5, - 10) and the point of intersection of the plane x - y + z = 5 and the line , will be
10
11
12
13
D.
13
A bag contains 3 black and 4 white balls. Two balls are drawn one by one at random without replacement. The probability that the second drawn ball is white, is
A speaks truth in 75% cases and B speaks truth in 80% cases, The probability that they contradict each other in a statement, is