What is the total number of guests at the party?
Explanation:
From the given data, we get the following diagram.
Let the total number of guests be x.
⇒ x = 144 + (25% of x) + (25% of x) + (5% of x)
⇒ x - x4 - x4 - x20 = 144
⇒ 9x20 = 144
⇒ x = 320.
The total guets at the party = 320.
Hence, option (a).
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