Question
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2.
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4.
Answer (Detailed Solution Below)
Option 3 : $37.5$
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Detailed Solution
सही उत्तर $37.5$ है।
Key Points
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prepsnap.in • Part -AQuestion:
The average of $12$ observations is $42$. Later it was found that two observations, $56$ and $38$, were wrongly recorded as $65$ and $83$. What is the correct average? / $12$ प्रेक्षणों का औसत $42$ है। बाद में पता चला कि $56$ और $38$ दो प्रेक्षण गलती से $65$ और $83$ लिखे गए थे। सही औसत कितना है?
1.
$38$
2.
$37$
3.
$37.5$
4.
$36.5$
Correct Answer: $37.5$
Correct sum = $12 \times 42 - 65 - 83 + 56 + 38 = 504 - 148 + 94 = 450$. Correct average = $\frac{450}{12} = 37.5$. / सही योग = $12 \times 42 - 65 - 83 + 56 + 38 = 450$। सही औसत = $\frac{450}{12} = 37.5$।
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