QUESTION 1 [12]
The bivariate beta type II pdf is defined by
fX1,X2
(x1, x2) = (24 (1 − x1 − x2)
−b)/
x
1−a
1 x
1−b
2
(1 − x1 − x2)
a+c
, x_1 > 0, x_2 > 0.
Find
(a) a, b and c; (2)
(b) E (X3
1X2
2
) ; and (5)
(c) the marginal pdf of X1.
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