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Susan has stamps of 5 different countries in her collection.
12% of the stamps are British stamps.
The number of British stamps is `2/3` of the number of Australian stamps.
20% of the stamps are American stamps.
25% of the stamps are Malaysian stamps.
The rest of the stamps are 150 Indian stamps.
(a) How many Australian stamps does Susan have in her collection?
(b) What is the difference between the number of Indian and British stamps?
Notes to students: