1. (4π/6)3(r/l)6
2. (4π/6) (r/l)2
3. (4π/6)2 (r/l)3
4. (4π/6)2 (r/l)4
(4π/6)2 (r/l)4
1. -∞≤ x ≤ ∞
2. -∞≤ x ≤ 1
3. x < 1, x > 1
4. -2 ≤ x ≤ 2
x < 1, x > 1
1. 4 or 1
2. 4 only
3. 1 inly
4. undefined
4 or 1
1. 0.00000
2. 1.0000
3. 0.00500
4. 0.00025
0.00000
1. E(XY)=E(X) E(Y)
2. Cov(X,Y) = 0
3. Var (X + Y) = Var (X) + Var (Y)
4. E(X2Y2) = (E(X))2(E(Y)2
E(X2Y2) = (E(X))2(E(Y)2
1.
2.
3.
4.
1. 25 %
2. 50 %
3. 80 %
4. 8 %
80 \%
1. R1=5ql/8, R2=3ql/8, M=ql2/8
2. R1=3ql/8, R2=5ql/8, M=ql2/8
3. R1=5ql/8, R2=3ql/8, M=0
4. R1=3ql/8, R2=5ql/8, M=0
R1=5ql/8, R2=3ql/8, M=ql2/8
1. 15
2. 30
3. 35
4. 45
30
1.
2.
3.
4.