Question
1.
2.
3.
4.
Answer (Detailed Solution Below)
Option 3 : 65.45 / 65.45
Advertisement
Detailed Solution
सही उत्तर 65.45 / 65.45 है।
Key Points
Helpful?
prepsnap.in • Part -AQuestion:
The average marks of 40 students is 65. Later it was found that the marks 72 and 58 were wrongly entered as 27 and 85. Find the correct average. / 40 छात्रों के औसत अंक 65 हैं। बाद में पाया गया कि 72 और 58 अंक भूल से 27 और 85 दर्ज कर दिए गए थे। सही औसत ज्ञात कीजिए।
1.
65.5 / 65.5
2.
65.4 / 65.4
3.
65.45 / 65.45
4.
66 / 66
Correct Answer: 65.45 / 65.45
Wrong total entered = $27 + 85 = 112$; correct total = $72 + 58 = 130$. Correction = $+18$. Correct sum = $40 \times 65 + 18 = 2618$; correct average = $\frac{2618}{40} = 65.45$. / गलत दर्ज योग = $27 + 85 = 112$; सही योग = $72 + 58 = 130$। सुधार = $+18$। सही कुल योग = $40 \times 65 + 18 = 2618$; सही औसत = $\frac{2618}{40} = 65.45$।
Downloaded from PrepSnap (prepsnap.in)