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?
A) 88,44,22 B) 133,66,33. C) 40,20,10. D) 44,22,11

Answer 1

let A, B, C be numbers.
B=2C
A=2B
A=2(2C)
A=4C
A+B+C/3 =77
A+B+C=3×77
4C+2C+C=3×77
7C=3×77
C=3×77/7
C=3×11
C=33
B=2C
B=2×33=66
A=4C
A=4*33
A=132
A=132,B=66,C=33 is answer

Answer 2

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