1.

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

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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