Analysis and Approaches for IBDP Maths Ebook 1 | Page 244

Your Practice Set – Analysis and Approaches for IBDP Mathematics
3. The following Venn diagram shows the events A and B , where P( B) � 0.6 ,
P( A�B) � 0.9 and P( A�B) � 0.4 . The values p and q are probabilities.
(a) (i) Write down the value of p .
(ii) Find the value of q .
(b) Find P( A ) .
[3]
[3]
4. The following Venn diagram shows the events A and B , where P( A) � 0.6 , P( B) � 0.2
and P( A��B�) � 0.3 . The values a and b are probabilities.
(a) (i) Write down the value of a .
(ii) Find the value of b .
(b) Find P( A� B)
.
[3]
[3]
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