3.Chris is going on holiday to the United States of America.
The exchange rate is £1 = $1.55
Chris has up to £720 to change into dollars but he can only get $20 or $50 notes.
What is the maximum number of dollars Chris can get?
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Given : The exchange rate is £1 = $1.55
Chris has up to £720 to change into dollars but he can only get $20 or $50 notes.
To Find : the maximum number of dollars Chris can get
Solution:
£1 = $1.55
=> £720 = $ 720 * 1.55 = 1116 $
As $20 or $50 notes are available hence amount should end up in Zero
maximum number of dollars Chris can get = 1110 $
One of the option for that is
50 * 21 + 20 * 3 = 1110
maximum number of dollars Chris can get = 1110 $
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