Question

the average of three numbers is 77. the first number is twice of the second one and second number is twice of the third number.find the three numbers?

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Answer 1

Answer:

Find the sum of the 3 numbers:

Average of the 3 numbers = 77

Sum of the 3 numbers = 77 x 3 = 231

Define x:

Let x be the third number

Second number = 2x

First number = 4x

Sum of the numbers is 231:

x + 2x + 4x = 231

7x = 231

x = 231 ÷ 7 = 33

Find the numbers:

third number = x = 33

second number = 2x = 2(33) = 66

third number = 4x = 4(33) = 132

Answer: The 3 numbers are 132, 66 and 33

Answer 2

Answer:

Sum of the numbers = 3 × 77 = 231

Let third number be x

Then, second number = 2x

First number = 4x

x + 2x + 4x = 231

⇒x = 33

First number = 4x

x = 132