1. πa2
2. πa2 / 2
3. πa2 / 3
4. πa2 / 4
πa<sup>2</sup> / 4
1. a circle
2. an ellipse
3. a parabola
4. a straight line
a circle
1. 2/3
2. 1/3
3. 1/4
4. 3/4
1/3
1. 3/4
2. 1/24
3. 1/4
4. 23/24
3/4
1. 2/5
2. 1/5
3. 2/3
4. 1/3
2/5
1. k=1/10,P(X<3)=3/5
2. k =1/10,P(X<3)=3/10
3. k=3/10,P(X<3)=1/10
4. k=1/24,P(X<3)=5/12
k =1/10,P(X<3)=3/10
1. 1/8
2. 1/4
3. 3/8
4. 1/2
3/8
1. 1,1
2. 1,2
3. 2,1
4. 2,2
1,1
1. 1-(5/2)(3/4)6
2. 1-(15/2)(3/4)6
3. 1-(5x35/6)
4. 1-(3/9)6
1-(5/2)(3/4)<sup>6</sup>
1. are the vertices of an equilateral triangle
2. are the vertices of a right angled triangle
3. are collinear
4. are the vertices of an isosceles triangle
are collinear