Numerical Ability
 The statistics of runs scored in a series by four batsmen are provided in the following table. Who is the most consistent batsman of these four?
Batsman Average Standard Deviation K 31.2 5.21 L 46.0 6.35 M 54.4 6.22 N 17.9 5.90

 K
 M
 L
 N
 K

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Most consistent player is the one with least dispersion in the scores. For this, Coefficient of Variance is used to measure relative measure of dispersion between two sets.
Coefficient of Variance(CV) = Standard Deviation Mean
Calculating it for all the four players.
K's CV = 0.167
L's CV = 0.138
M's CV = 0.114
N's CV = 0.329
Larger the value of CV, less consistent is the player. So the most consistent player is M.Correct Option: B
Most consistent player is the one with least dispersion in the scores. For this, Coefficient of Variance is used to measure relative measure of dispersion between two sets.
Coefficient of Variance(CV) = Standard Deviation Mean
Calculating it for all the four players.
K's CV = 0.167
L's CV = 0.138
M's CV = 0.114
N's CV = 0.329
Larger the value of CV, less consistent is the player. So the most consistent player is M.
 The current erection cost of a structure is Rs.13,200. If the labour wages per day increase by 1/5 of the current wages and the working hours decrease by 1/24 of the current period, then the new cost of erection in Rs. is

 16,500
 15,180
 11,000
 10,120
 16,500

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Cost ∝ (wages × hours)
c ∝ whCorrect Option: B
Cost ∝ (wages × hours)
c ∝ wh

Find the sum of the expression 1 + 1 + 1 + ..........+ 1 √1 + √2 √2 + √3 √3 + √4 √80 + √1

 7
 8
 9
 10
 7

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Multiply each term and divide each term by its conjugate.
Correct Option: B
Multiply each term and divide each term by its conjugate.
 A tourist covers half of this journey by train at 60 km/h, half of the remainder by bus at 30 km/h and the rest by cycle at 10 km/h. The average speed of the tourist in km/h during his entire journey

 36
 30
 24
 18
 36

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V_{avg} = Total distance Total time Correct Option: C
V_{avg} = Total distance Total time
 Out of all the 2digit integers between 1 and 100, a 2digit number has to be selected at random. What is the probability that the selected number is not divisible by 7?


13 90

12 90

78 90

77 90


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P(A) = 1 – P (A)
P(A) = 1  13 = 77 90 90 Correct Option: D
P(A) = 1 – P (A)
P(A) = 1  13 = 77 90 90