Given that the average of data a, B and C is D and the variance is e, what is the average and variance of a group of new data 3a-2, 3b-2 and 3c-2?

The average is 3d-2, and the tolerance is 3D. If you don't understand this problem, you can't learn the next knowledge at all

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1. The known elements are integer sequence {1}, {2,3}, {4,5,6}, {7,8,9,10} Starting from the second sequence, each number set has one more number than the previous number set, and the minimum number of each number set is 1 larger than the maximum number of the previous number set. Find the sum SN of all numbers in the nth number set
2. The wrong understanding of Ohm's law is () A. For a certain section of conductor, the current in the conductor is directly proportional to the voltage at both ends. B. under certain voltage conditions, the current in the conductor is inversely proportional to the resistance of the conductor. C. The current in the conductor is determined by the voltage and resistance at both ends. D. the current in the conductor is independent of the voltage and resistance at both ends
3. First column, second column, third column, fourth column First line 1 2 9 10 second line 4 3 8 11 third line 5 6 7 12 fourth line 16 15 14 13
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13. The variance of sample data 10 10.19.7 9.9 10.3 is the mean of data 1-20-11, is the variance s #; yes
14. If the average of a set of data 2, 4, x, 6, 8 is 6, then the standard deviation of this set of data is () A. 10B. 8C. 6D. 22
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