If the mean of the scores a,b,c,d is 10 then find the mean of 2a-1,2b-1,2c-1,2d-1.
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a+b+c+d/4=10
a+b+c+d=40
now according to the question
(2a-1)+(2b-1)+(2c-1)+(2d-1)/4
2a-1+2b-1+2c-1+2d-1/4
2a+2b+2c+2d-4/4
2 (a+b+c+d)-4/4
2 (40)-4/4
80-4/4
76/4
19
that's is the mean of question
a+b+c+d=40
now according to the question
(2a-1)+(2b-1)+(2c-1)+(2d-1)/4
2a-1+2b-1+2c-1+2d-1/4
2a+2b+2c+2d-4/4
2 (a+b+c+d)-4/4
2 (40)-4/4
80-4/4
76/4
19
that's is the mean of question
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