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The average of three numbers is 40. First number is 4/3 of the third number. If third number is 20 less than second number, then what is the value of second number?1). 602). 503). 104). 20 |
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Answer» Let third number be 3x So, the first number is 4X And second number = 3x + 20 We know, average = SUM of all the observation/total number of observation According to the question Average = (4x + 3x + 20 + 3x)/3 ⇒ (4x + 3x + 20 + 3x) = 40 × 3 = 120 ⇒ 10X = 100 ⇒ x = 10 ∴ Second number = 3x + 20 = 3 × 10 + 20 = 30 + 20 = 50 |
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