Of the four numbers, whose average is 60, the first is one-fourth of the sum of the last three. The first number is :
Choose the correct choice from the following answers.
A) 17	B) 29	C) 36	D) 48	E) 58
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= 
<gadget id="calculator">(60 * 4) / 5</gadget>
<output>48</output>
48. Answer: 48
<result>D</result>
Of the four numbers, whose average is 60, the first is one-fourth of the sum of the last three. The first number is :