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Solution

Section A

Solution.1
Solution.2
We have ho(gof)(x) = h[gof(x)] = h[g(3x)]

= h{4(3x)+3} = h(12x+3) = sin(12x+3)
Solution.3
3/
,
-2/
,
4/
Solution.4
We have P(
A/B
) =
P(A∩B)/P(B)
=
1/7
/
3/7
=
1/3

∴ P(B) + P(B)' = 1