A stock index contains two stocks, A and B. On Wednesday stock A closed at $35 per share and on Thursday at $30. On Wednesday stock B closed at $250 per share and on Wednesday at $230. Stock A has 4 million shares in its free float, and stock B has 3 million in its free float.
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a) What is the change in the price-weighted index of stocks A and B from Wednsday to Thursday?
b) What is the change in the value-weighted index of stocks A and B from Wednesday to Thursday?