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Of the four numbers, whose average is 60, the first is one-fourth of the sum of the last three. The first number is :

Correct Answer: 48

Explanation:

Let the first number be x,

Then, sum of the four numbers = x + 4x = 5x.

so, 5x/4 = 60 or x = (60 * 4) / 5 = 48.

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