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Among three numbers, the first is twice the second and thrice the third. If the average of three numbers is 198, then what is the difference between the first and the third number?1). 2162). 2973). 6614). 431 |
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Answer» LET first number = 2x Second number = x Third number = 2x/3 Average of three number is 198 (x + 2x + 2x/3)/3 = 198 11x = 1782 x = 162 First number = 2 × 162 = 324 Third number = 324/3 = 108 Difference between first and third number = 324 – 108 = 216 |
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