A total of 149 oranges would be needed
Dimensional analysis
Every 3 oranges squeezed yields 10 oz of juice.
A cup of juice is 8 oz. Thus, in order to make a cup of juice, the number of oranges required will be:
3 x 8/10 = 2.4 oranges.
For 2 cups = 2.4 x 2 = 4.8 oranges.
Each guest wants to have 2 cups of juice. This means that each guest needs 4.8 oranges in order to have 2 cups of juice.
There are 62 guests in total. The total number of oranges required can, thus, be estimated as;
62 x 4.8 = 148.8 oranges
Since there are no orange fractions, it means that a total of 149 oranges will be required in order to take care of the guest.
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