Question

if the mean if the scores a, b, c, d is 10 then find the mean of 2a-1, 2b-1, 2c-1, 2d-1​

Answer 1

Answer:

19

Step-by-step explanation:

Mean of a, b, c, d = 10

Mean = (a + b + c + d)/4 = 10

(a + b + c + d) = 40 ___________(1)

Now according to question, Mean of 2a-1, 2b-1, 2c-1, 2d-1 is:

= (2a-1 + 2b-1 + 2c-1 + 2d-1)/4

= (2a + 2b + 2c + 2d - 1 - 1 - 1 -1)/4

= (2(a + b + c + d) - 4)/4

from equation (1), we get:

= (2(40) - 4)/4

= 19

Thank you!