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Helena had 1500 stamps in her album.
She had only Indian and Australian stamps.
30% of these were Australian stamps.
She visited an exhibition and purchased some new Indian and Australian stamps.
Subsequently, the number of Indian stamps that she had increased by 20%.
Eventually, 40% of the total number of stamps in Helena's album are Australian stamps.
(a) How many Australian stamps does Helena have in her collection now?
(b) How many Australian stamps did she buy?
Notes to students:
- If the question above has parts, (e.g. (a) and (b)), given that the answer for part (a) is 10 and the answer for part (b) is 12, give your answer as:10,12