Apps. and Interpretation for IBDP Maths Ebook 1 | Page 268

Your Practice Set – Applications and Interpretation for IBDP Mathematics
4. Consider the independent events A and B . Given that P( B) � 3P( A)
, and
P( A�B) � 0.93 , find P( B ) .
(a) Let x�
P( A)
. Show that
(b) Hence, find P( B ) .
2
300x
400x
93 0
� � � .
[4]
[3]
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