1st Match
Mean of 11 scores = 354/11 = 32.18
Sum of squared difference from mean for each number = (33-32.18)^2 + (24-32.18)^2 + ......+ (26-32.18)^2 = 815.6364
Average of Squared difference (Variance) = 815.6364/11 = 74.1487
Population Standard Deviation = Square root of variance = 74.1487^1/2 = ~8.610
2ns Match
Mean of 11 scores = 410/11 = 37.27273
Sum of squared difference from mean for each number = (13-37.27)^2 + (44-37.27)^2 + ......+ (7-37.27)^2 = 7326.18
Average of Squared difference (Variance) = 7326.18/11 = 666.016
Population Standard Deviation = Square root of variance = 666.016^1/2 = ~25.807
Difference between Population standard deviation of 2nd match and 1st match = 25.807 - 8.610 = ~17.197
Success can be achieved by integration of small goals and differentiation of negative thoughts.
Anuj Rai
The difference between a two-digit number and the number obtained by interchanging the digits is 36. What is the difference between the sum and the difference of the digits of the number if the ratio between the digits of the number is 1 : 2 ?