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The average of marks of 14 student was c...

The average of marks of 14 student was calculated as 71. But It was later found that the marks of one student had been wrongly entered as 42 instead of 56 and of another as 74 instead of 32. The correct average is:

A

67

B

68

C

69

D

71

Text Solution

Verified by Experts

The correct Answer is:
C
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The average marks of 18 students in an examination was 60. It was later found that the marks of one student had been wrongly entered as 63 instead of 36. The correct average is:

The average marks of 40 students in an examnation was 25. It was later found that the marks of one student had been wrongly entered as 73 instead of 37.What is the value of correct average?

The average marks of 18 students in an examination was 60. It was later found that the marks of one student had been wrongly entered as 63 instead of 36. The correct average is: किसी परीक्षा में 18 छात्रों के अंको का औसत 50 था। बाद में यह पाया गया कि किसी छात्र के अंक 36 के बजाय 63 लिखे गए थे। सही ओसत ___ होगा।

the average marks of 20 students is 70. Afterwards, it is found that the marks of 2 students are taken wrong as 54 and 74 instead of 64 and 84. Find the correct average.

In an exam, the average marks of 40 students is 75. Afterwards, it is found that the marks of 2 students are taken wrong as 56 and 38 instead of 65 and 69. Find the correct average.

In an examination, the mean of marks scored by a class of 30 students was calculated as 58.5 Later on, it was detected that the marks of one student was wrongly copied as 57 instead of 75. Find the correct mean.

The average marks of 50 students in a class was found to be 64. If the marks of two students were incorrectly entered as 38 and 42 instead of 83 and 24 respectively, then what is the correct average? किसी कक्षा में 50 छात्रों के औसत अंक 64 पाए गए | यदि दो छात्रों के अंक भूलवश 83 एवं 24 के बजाय क्रमशः 38 और 42 लिखे गए थे, तो सही औसत ज्ञात करें |

KIRAN PUBLICATION-AVERAGE-TYPE-V
  1. The average of marks of 14 student was calculated as 71. But It was la...

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  2. The average marks of 72 students is shown as 69. It Includes a wrong e...

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  3. The average of 50 numbers is 38. If the two numbers 45 and 55 are not ...

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  4. The average weight of 15 students in a class increases by 1.5kg when o...

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  5. The average of six numbers is 20. If one number is removed, the averag...

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  6. The average of 25 observations is 13. It was later found that an obser...

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  7. While finding the average of 10 given numbers, a student, by mistake, ...

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  8. A boy found that the average of 20 numbers is 35 when he writes a numb...

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  9. A student finds the average of ten 2-digit numbers. While copying numb...

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  10. The average marks obtained by a student in 6 subjects is 88. On subseq...

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  11. Average marks of 100 students of a class is 58. Later it was found tha...

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  12. Average price of f 100 articles is 46. Later it was found that 16 was ...

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  13. In an exam, the average marks obtained by the students was found to be...

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  14. The average marks of 40 students in an examination was 25. It was late...

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  15. The average weight of 20 students in a class is increased by 0.75 kg w...

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  16. There are 50 students in a class. One of them weighing 50 kg goes away...

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  17. The average weight of 12 crewmen in a boat is increased by 1/3 kg, wh...

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  18. The average marks obtained by 22 candidates in an examination are 45. ...

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  19. The mean of 20 items is 55. If two items 45 and 30 are removed, the ne...

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  20. The average marks obtained by 40 students of a class is 86. If the 5 h...

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