The average of three numbers is 28. If the first number is…
The average of three numbers is 28. If the first number is half of the second number and the third number is double the second number, then the third number = ?
तीन संख्याओं का औसत 28 है। यदि पहली संख्या दूसरी संख्या की आधी और तीसरी संख्या दूसरी संख्या की दोगुनी है, तो तीसरी संख्या क्या है?
Detailed Solution & Logic
48
Solution
मान लेते हैं दूसरी संख्या = $x$
पहली संख्या = $x/2$
तीसरी संख्या = $2x$
औसत = 28, इसलिए तीनों संख्याओं का योग:
$28 \times 3 = 84$
अब,
$x/2 + x + 2x = 84$
$3.5x = 84$
$x = 24$
तीसरी संख्या:
$2 \times 24 = 48$
सही उत्तर: 48
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