Speed of the goods train = x km/hr.
In 6 hours, the passenger train covers = 75 × 6 = 450 km
Distance Covered by the goods train = x × 15 = 15x km in 15 hours.
Thus, 15x = 450
x = 450/15 = 30 km/hr
∴ The speed of the goods train is 30 km/hr.
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12 Mins English English50 Questions100 Marks60 Mins English English10 Questions20 Marks12 Mins EnglishFor different sets of datasets X and Y. correlation coefficient between X and Y, that is R and standard deviation of X and Y, that is, S(X) and S(Y) are given in A-D below. Estimate the covariance between X and Y for each dataset and arrange in ascending order.
A. R= 0.5, S(X)= 8, S(Y)= 10
B. R= 4/7, S(X)= 7, S(Y)= 9
C. R= 0.7, S(X)= 12, S(Y)= 5
D. R= 19/42, S(X)= 14, S(Y)= 6
Choose the correct answer from the options given below:
Arrange the following fractions in increasing order:
A.
B.
C.
D.
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