6.
The standard deviation of 10 values is 4. If each value is increased by 3, then find the variance of the new set of values
- A.49
- C.19
- B.16
- D.7
- Answer & Explanation
- Report
Answer : [A]
Explanation :
Explanation :
| S.D. of 10 values = 4 | |||||||||||||
| Increment in each value = 3 | |||||||||||||
| S.D. is unchanged by the increment in the values. | |||||||||||||
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7.
| In the following table find, the average score of the students | ||||||||||||||
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- A.39
- C.42
- 40
- D.41
- Answer & Explanation
- Report
Answer : [B]
Explanation :
Explanation :
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| If we compare the least and highest value the variation is less in A and more in B. | |||||||||
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8.
The mean of the runs scored by three batsman A,B and C in the same series of innings are 58, 48 and 147 respectively. The S.P. of their runs are 15, 12 and 2 respectively. Who is the most consistent batsman?
- A.C
- C.A
- B.B
- D.Cannot be determined
- Answer & Explanation
- Report
Answer : [A]
Explanation :
Explanation :
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| C.V for C is the least. Hence the batsman C is more consistent. | |||||
9.
Sangeetha is seven years older than Divya. Fifteen years ago, Divya’s age was three quarters of Sangeetha’s age. Find the age of Sangeetha now.
- A.44
- C.42
- B.43
- D.41
- Answer & Explanation
- Report
Answer : [D]
Explanation :
Explanation :
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10.
The median of the following data: 31, 35, 27, 29, 43, 37, 41, 35, 30
- A.31
- C.37
- B.30
- D.35
- Answer & Explanation
- Report
Answer : [D]
Explanation :
Explanation :
| Arranging the given data in ascending order, | ||||||||||||||||||
| 27, 29, 30, 31, 35, 37, 41, 43 | ||||||||||||||||||
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| Here the number of terms = 9 which is old | ||||||||||||||||||
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